▁conducted ▁under ▁ground , ▁in ▁accord ance ▁with ▁the ▁Part ial ▁Test ▁Ban ▁Tre aty . ▁An ▁additional ▁foot note ▁is ▁Operation ▁Rol ler ▁Co aster . ▁Although ▁this ▁later ▁series ▁of ▁tests ▁involved ▁no ▁true ▁nuclear ▁det on ation , ▁they ▁did ▁dis per se ▁radio active ▁material ▁using ▁conventional ▁explos ives ▁and ▁thus ▁may ▁altern atively ▁be ▁considered ▁the ▁last ▁above ground ▁nuclear ▁test . ▁ ▁References ▁ ▁External ▁links ▁" The ▁Dav y ▁Cro ck ett " ▁from ▁the ▁Brook ings ▁Institution ▁ ▁Video ▁of ▁the ▁M - 3 8 8 ▁Dav y ▁Cro ck ett ▁N uc lear ▁Test ▁Operation ▁I vy ▁Fl ats ▁government ▁film ▁( 1 9 6 2 ) ▁ ▁Category : N ev ada ▁Test ▁Site ▁nuclear ▁explos ive ▁tests ▁Category : 1 9 6 2 ▁in ▁Nev ada ▁Category : J uly ▁ 1 9 6 2 ▁events <0x0A> </s> ▁Sm ol ensk aya ▁Mountain ▁() ▁is ▁a ▁small ▁mountain , ▁ 2 , 8 9 0 ▁m , ▁standing ▁ 2 . 5 ▁na ut ical ▁miles ▁( 4 . 6   km ) ▁east - s out heast ▁of ▁Mount ▁Ne ust ru ye v ▁in ▁Sud liche ▁Pet ermann ▁Range , ▁W ohl that ▁Mountains . ▁Disc over ed ▁and ▁pl otted ▁from ▁air ▁photos ▁by ▁German ▁Ant ar ctic ▁Ex ped ition , ▁ 1 9 3 8 – 3 9 . ▁M apped ▁from ▁air ▁photos ▁and ▁surve ys ▁by ▁Norwegian ▁Ant ar ctic ▁Ex ped ition , ▁