contact with jihadists when he visited russia in 2012. after returning to the u.s., a video known as abu dujana was posted and then removed fr. >> there's something we're missing. i have an uneasy feeling about it. not having the facts i can't assure you 100%. >> reporter: tsarnaev's brother claims they had no contact with any foreign terrorist organization. and online preachings of anwar al awlaki are likely influences but it proves elusive, there is no doubt in his ability to conceal the sinister plans from those closest to i am hahim, hi parents and even his wife. >> this came as an absolute shock to them all.