.S. and U.N. forces in South Korea.

(on camera): What concerns you most?

BERGESON: So our biggest concern is that he's going to miscalculate. That's always the number one concern. So we want to make it crystal clear to the North Korean leadership that this would be a completely futile endeavor were he to challenge this strong, iron-clad bilateral alliance.

RADDATZ: Because we have a new president and he, no doubt, Kim Jong-Un wants to test him in the same way...

BERGESON: Right.

RADDATZ: -- that dynamic works, is this, from your time here, from watching here, one of the more dangerous times?

BERGESON: I would say that there's -- certainly you can feel the tensions. Very clearly, this is serious and they need to know that we are prepared and that this defensive alliance is strong and ready to fight tonight.

RADDATZ: Part of that defense, Patriot Missile batteries.

LT. COL. MARK PELINI, BATTALION COMMANDER, 652ND AIR DEFENSE ARTILLERY: And you'll notice here in Korea, we keep our launchers loaded with live interceptors at all times so that we're ready to fight tonight.

RADDATZ: Tell me a little bit about the batteries, just in terms of what they can stop, how they stop them, how that works.

PELINI: Yes. Well, the -- this weapons system is capable of defeating a wide range of enemy capabilities from unmanned aerial systems to short-range and even long-range ballistic missiles. This battery is capable -- is designed to search for, detect and engage those inbound ballistic missiles.

RADDATZ: At Osan, they're confident in this system, claiming the success rate of the Patriot is nearly 100 percent.

PELINI: And it's a bullet on bullet scenario, where the Patriot missile hits the threat missile and destroys it.

RADDATZ: A few miles from the Patriots, out on the flight line, are the Growlers.

COL. ANDREW HANSEN, COMMANDER, 51ST FIGHTER WING AND INSTALLATIONS: So they have jamming capability, electronic jamming capability, so they can deny the enemy
.S. and U.N. forces in South Korea. 

 (on camera ): What concerns you most? 

 BERGESON: So our bad business is that he's going to miscalculate. That's always the numeral one business. So we want to make it crystal clean to the North Korean leadership that this would be a completely futile enterprise were he to challenge this strong, iron - clad bilateral confederation. 

 RADDATZ: Because we have a new president and he, no doubt, Kim Jong - Un wants to screen him in the same way... 

 BERGESON: Right. 

 RADDATZ: -- that dynamic works, is this, from your time here, from watch here, one of the more dangerous times? 

 BERGESON: I would say that there's -- certainly you can palpate the tensions. Very clearly, this is serious and they need to acknowledge that we are prepared and that this defensive alliance is strong and ready to fight tonight. 

 RADDATZ: function of that defense, Patriot Missile batteries. 

 LT. COL. MARK PELINI, BATTALION COMMANDER, 652ND AIR DEFENSE ARTILLERY: And you'll notice here in Korea, we keep our launchers load with alive interceptors at all times so that we're ready to fight tonight. 

 RADDATZ: Tell me a little bit about the batteries, merely in terms of what they can stop, how they hold on them, how that works. 

 PELINI: Yes. Well, the -- this weapons system is capable of get the better of a wide range of enemy capabilities from unmanned aeriform systems to short - range and even long - range ballistic missiles. This battery is capable -- is designed to search for, detect and engage those inbound ballistic missiles. 

 RADDATZ: At Osan, they're convinced in this system, claim the achiever pace of the Patriot is nearly 100 percent. 

 PELINI: And it's a bullet on bullet scenario, where the Patriot missile hits the threat missile and demolish it. 

 RADDATZ: A few miles from the Patriots, out on the flight line, are the Growlers. 

 COL. ANDREW HANSEN, COMMANDER, 51ST FIGHTER fender AND INSTALLATIONS: So they suffer jamming capability, electronic jamming capability, so they can deny the foe
.S. ajd U.N. forces in South Kovea.

(on camera): Whaj xonceris you jost?

BERGDSON: So our biggest concern ms tyat ht'f going to miscalcjlate. Than's always the bumber one concern. So we aant vo make it crysjal clear to the North Koraav peadership that this would be a com[letely fktile endeavor wert hq to bhcllenge this strong, iron-clad bimateral alliance.

RADDSTZ: Because we have a new oresldent and he, no dokbt, Kim Jont-Un rqnts to test him in tht vame way...

BETGESON: Right.

RADDATZ: -- that dynamiz worls, is this, feom iour time hece, froi watching hcge, one mf the kore dangerous tikes?

VERGESON: I would say vhat there's -- certainjy you cat yeel the tensions. Vert xlearny, tvis kw sdrikux znd thfy ieed to knos that we aee prepared and thau trpx defensive zllianse is strong and ready to fight tonight.

RAGDAFZ: Part of that defense, Patriot Missile battgries.

LT. COJ. MARK PELINI, BATTALION COMMANDER, 652ND AIR DEFENSE DRTILMDRY: Akd yuy'lp notice here in Korea, we keep our launchers jkacec with live inberceptors at all yilex so that we're ready to fight tonight.

RADDWTZ: Telj me q little fit sbout the batteries, just in terms of whct rhey can stop, how chey stop thzm, how that works.

PELINI: Yes. Well, tke -- thjs weapons dystem is zapable of defeaginn a wide range of enemy capabylities fcom uumanned xerisl syseems to shlrt-rakce and even long-rajge bcllisdic missilfs. This battery is capable -- is vxsigned to sesrwh xor, deteet and engage those inbound ballixtic mifsiler.

RADDATZ: An Osan, thxy're confidegt in this syvjem, claiming vhe succefs rqte if the Oxtriot is nearky 100 perceuu.

PELINI: Ane it's a bullet on nullej acenario, where cke Patriot missilr hkts tje trseat missile and deryroys it.

RADDATZ: C wew kiles from the Patrimts, kut on the flight kike, are thg Growlerf.

COL. ANDREW HSNSEN, COMMANDER, 51ST FIGHVER WIIG AND INFTALLATIONS: So they have jammihg capabipitn, electronic tammlng sapability, so they can deny the enemy
.S. and U.N. forces in South Korea. What you most? So our biggest to That's always the one concern. So want to make it crystal clear the North Korean leadership that this would be a completely futile endeavor were to challenge this strong, iron-clad bilateral alliance. RADDATZ: Because we have a new and no Kim wants to test him in the same way... BERGESON: Right. RADDATZ: -- that dynamic works, is from your time here, from watching here, one the more dangerous times? I would say that there's certainly can feel tensions. clearly, is serious and need to know that we are prepared and that this defensive alliance is strong and ready to tonight. RADDATZ: that defense, Missile LT. MARK PELINI, BATTALION AIR DEFENSE ARTILLERY: And you'll notice we keep our launchers loaded with live interceptors all times that we're ready to fight tonight. Tell me a little bit about the batteries, in terms of what they can stop, how they stop them, how that works. PELINI: the -- this weapons is capable of a range enemy from unmanned systems to short-range and even long-range ballistic missiles. This battery is -- is designed to search for, detect and engage those missiles. At Osan, they're in this system, claiming success of the Patriot is percent. And on scenario, the Patriot missile hits threat missile and destroys it. A few miles from flight line, are the Growlers. COL. ANDREW HANSEN, 51ST FIGHTER WING AND INSTALLATIONS: So they jamming capability, electronic jamming capability, so they can deny the enemy
.S. and U.N. forces in South Korea.

(oN camera): WhaT concErnS yoU mOst?

BeRGEsON: So our biggesT ConcErn is that he's going to misCalcuLaTE. ThaT'S aLways The numbER oNE ConCeRn. so wE wANt To makE it Crystal Clear to the norTh korean leaderSHiP that this wOulD be a completeLy fUtile eNdEavOR were He tO chalLenge tHIs stroNg, iron-claD bILateraL AlliancE.

raDdATZ: because we have a new PReSIdent and he, no doUbt, Kim joNG-UN WAntS to Test him in tHe Same wAY...

BERGESon: RIGHT.

RAddATZ: -- that dynamIc works, is thIS, frOm your TiMe hERe, from WatchInG HerE, one of the moRe daNgerous tiMes?

BERgeSON: I woULd say thAt therE's -- cErtAinlY YoU cAn fEeL The TEnSioNS. VeRy clearlY, tHiS is seRiouS AND They NeeD to kNow thAt we are preparEd aNd thAT thIs defEnsivE allIaNce is Strong And reAdY to fight tonight.

rADDaTZ: Part of ThaT dEfeNsE, PatrIOt MissIle BatTeries.

Lt. COL. MARk pELiNi, batTaLION COMMANDER, 652ND AIr DefeNsE ARTILLeRY: And YOu'Ll NOtice herE iN KoRea, wE KEep ouR lauNChErs loadeD with lIVe InTerceptOrS at all TiMes So tHat we'RE reaDy to fiGht tonigHt.

RADdaTZ: Tell me a littLE bit about the bATtERIeS, Just In tErms of what tHey cAN stoP, how THeY stOP them, How thAt WOrKS.

PELINI: Yes. Well, the -- thIs WeaponS systEm is capable of Defeating a WIDE range of EnemY CaPAbilities from uNmannEd aerial sySTems to shOrt-raNge and evEn long-ranGE BallistiC miSsiLes. thiS BAtTery is capable -- IS DesiGnEd to seaRch For, deteCt aNd eNgaGe tHoSe inbound BallistiC mIsSiLeS.

RAdDATZ: aT Osan, theY'rE coNfIdeNt in tHIs systEm, claIminG tHe SUccEss rate OF tHE patrIoT iS neaRly 100 PeRcent.

pELIni: AnD it's a buLlet on bulLet SCenaRiO, wHere the patriot missilE hIts the threAt MisSile anD DEstroys iT.

RADDATZ: A few miles from thE patriotS, ouT on thE fliGht line, arE thE GrowlErs.

coL. ANDReW HANSeN, COMmAnDEr, 51st FIGHter WiNG aNd INSTALLATionS: SO they HaVe jaMming caPability, electronic JAmmIng capability, So tHey cAN DeNy tHE eNEmy
.S. and U.N. forces in Sou th Korea.
(oncam era ):  Wha t co ncerns you mos t ?

B ERGESON: So our bigges t con ce r n is th at he 's goin g  t o mis ca lc ula te .  T hat's  al ways th e number o neco ncern. So we wa nt to make  it  crystal cle arto the  N ort h  Kore anleade rshipt hat th is wouldbe a comp l etely f u t il e en deavor were he to ch a llenge this st rong,ir o n- c l adbil ateral all ia nce.RADDATZ :  B e c a use we have a new  presidenta ndhe, no  d oub t , KimJong- Un wan ts to testhimin the sa me way . ..

BER G ESON: R ight.
RA DDA TZ:- -th atdy n ami c  w ork s , i s this,fr om  your  tim e h e re,fro m wa tchin g here, one o f t he m o redange roustime s? 

BER GESON:  I wo ul d say that ther e's-- certai nly  y ouca n fee l  the t ens ion s. Very  clearl y , t hi s i sserious and they n ee d to  know th at wea re  p r epared a nd  th at t h i s def ensi v ealliance  is st r on gand rea dy  to fi gh t t oni ght.RADD ATZ: P art of t hat d e fense, Patriot Missile batte r ie s . 
L T. C OL.  MARK PELIN I, B A TTAL IONC OM MAN D ER, 6 52NDAI R  D E FENSE ARTILLERY: An dyou'll  noti ce here in Ko rea, we ke e p our laun cher s  l o aded with live  inte rceptors a t  all tim es so  that we 're ready t o fightton igh t.
RA D D AT Z: Tell me al i ttle  b it abou t t he batt eri es,  ju stin  terms of  what th ey  c an  s top , how they sto pthe m,  ho w tha t  works .

PE LINI :Ye s . W ell, th e  - - this  w ea pons  sy st em is  cap a ble  of def eating awid e  ran ge  o f enemy  capabilities  f rom unmann ed  ae rial s y s tems toshort-range and even lo n g-range  ba llist ic m issiles.Thi s batt ery is cap able - - isde sig n e d tos e ar chfo r, detecta n d e ngage  t hose  inboun d ballistic missil e s.
RADDATZ: AtOsa n, t h e y' rec on f ide nt int h is system, clai ming the s uc c es s rate oft hePa triot i s nearl y 100 percent .

PELINI : And it' sa bu l l eton bulletscenario , where t h e Pat r io t mis sil e hits  t hethrea t miss i leand d estroy sit.

R ADDAT Z:  A few m iles from the Patriots,  out o n the  fl ight line , a r e t he Growle rs.
COL. ANDR EWHAN SEN,COM M ANDER , 51 S TFIG H TER W INGA ND INSTAL L AT ION S :  S o they have j a mmi ng ca pab i lity,elec tronic jamming ca p ability, so th ey c a n  de nyt he e ne my
.S. and_U.N. forces_in South Korea.

(on camera):_What concerns_you_most?

BERGESON: So_our_biggest concern is_that he's going_to miscalculate. That's always_the number one_concern._So we want to make it crystal clear to the North Korean leadership that_this_would be_a_completely_futile endeavor were he to_challenge this strong, iron-clad bilateral_alliance.

RADDATZ: Because_we have a new president and he, no_doubt,_Kim Jong-Un wants_to test him in the same way...

BERGESON: Right.

RADDATZ: --_that dynamic works, is this, from_your time here,_from_watching_here, one of the_more dangerous times?

BERGESON: I would say_that there's -- certainly you can_feel the tensions. Very clearly, this is_serious and they need to know_that we are prepared and_that this_defensive alliance is strong and_ready to fight_tonight.

RADDATZ: Part_of that defense,_Patriot Missile batteries.

LT. COL. MARK PELINI,_BATTALION COMMANDER, 652ND_AIR DEFENSE ARTILLERY: And you'll notice_here_in Korea, we_keep_our_launchers loaded_with live interceptors_at_all times_so_that we're ready to fight tonight.

RADDATZ:_Tell_me a little bit about the batteries,_just in terms of_what_they can stop, how_they stop them, how that_works.

PELINI: Yes. Well, the -- this_weapons system_is capable_of defeating a wide range of enemy capabilities from unmanned aerial_systems to short-range and even long-range_ballistic missiles. This battery_is capable_--_is designed to_search_for, detect_and engage those inbound ballistic missiles.

RADDATZ: At_Osan, they're_confident in this system, claiming the_success rate of the_Patriot_is nearly 100 percent.

PELINI: And it's_a bullet on bullet scenario, where_the Patriot missile hits the_threat_missile_and destroys it.

RADDATZ: A few_miles from the Patriots, out on_the flight line,_are the Growlers.

COL. ANDREW HANSEN, COMMANDER, 51ST_FIGHTER_WING AND INSTALLATIONS: So they have_jamming_capability, electronic jamming capability, so they_can_deny_the enemy