Since Rahmani entered the US as a 7-year-old boy, the interview to screen him would have been pretty basic.
Folks don't go there on vacation.
And this refugee problem is also Bush 43's mess.
The family ties, being Islamic, trips to Afghanistan, his history in US, all should have been flags. The family has history. Deport whoever’s left here and send the bomber’s dead carcass along as well once he is dead.