As computerized as most things are you would think if the number from a stolen passport is entered for any reason- especially to buy airline tickets it would trigger a flag- to be rejected or checked further...
You would think a Russian warning to Boston DH”S”
and DO”J” that the Boston Marathon is about to be
bombed by specific terrorists would have stopped SOMETHING!!!
But it did not. They were let in to return to the USA
without passports.
Since no one cares, and no one was arrested, it
explains everything before and since.