▁to ▁allow ▁local , ▁state , ▁and ▁domestic ▁Federal ▁ag encies ▁to ▁access ▁imag ery ▁from ▁military ▁intelligence ▁Re con na issance ▁sat ell ites ▁and ▁Re con na issance ▁aircraft ▁sens ors ▁which ▁can ▁now ▁be ▁used ▁to ▁observe ▁the ▁activities ▁of ▁U . S . ▁citizens . ▁The ▁sat ell ites ▁and ▁aircraft ▁sens ors ▁will ▁be ▁able ▁to ▁pen et rate ▁cloud ▁cover , ▁detect ▁chemical ▁traces , ▁and ▁identify ▁objects ▁in ▁buildings ▁and ▁" under ground ▁b unk ers ", ▁and ▁will ▁provide ▁real - time ▁video ▁at ▁much ▁higher ▁resolution s ▁than ▁the ▁still - images ▁produced ▁by ▁programs ▁such ▁as ▁Google ▁Earth . ▁ ▁Ident ification ▁and ▁credentials ▁ ▁One ▁of ▁the ▁simplest ▁forms ▁of ▁identification ▁is ▁the ▁carrying ▁of ▁credentials . ▁Some ▁nations ▁have ▁an ▁identity ▁card ▁system ▁to ▁aid ▁identification , ▁whilst ▁others ▁are ▁considering ▁it ▁but ▁face ▁public ▁opposition . ▁Other ▁documents , ▁such ▁as ▁pass ports , ▁driver ' s ▁lic enses , ▁library ▁cards , ▁bank ing ▁or ▁credit ▁cards ▁are ▁also ▁used ▁to ▁verify ▁identity . ▁ ▁If ▁the ▁form ▁of ▁the ▁identity ▁card ▁is ▁" machine - read able ", ▁usually ▁using ▁an ▁encoded ▁magnetic ▁stri pe ▁or ▁identification ▁number ▁( such ▁as ▁a ▁Social ▁Security ▁number ), ▁it ▁cor ro bor ates ▁the ▁subject ' s ▁ident ifying ▁data . ▁In ▁this ▁case ▁it ▁may ▁create ▁an ▁electronic ▁trail ▁when ▁it ▁is ▁checked ▁and ▁sc anned , ▁which ▁can ▁be ▁used ▁in ▁profil ing , ▁as ▁mentioned ▁above .