extremism. one of the men, elton simpson, clearly posted he wanted to sell that dark sedan that was eventually used to drive to texas. we also spoke to the mosque president who said even though he knew about elton simpson's arrest in 2011 he thought that may have been just a bad arrest. he may have screwed up with the fbi. he did not see this coming. here's what he told us. >> you know, two members that they didn't show any signs of radicalization or any signs of even thinking about those things in that manner. so when that happens, you just it shocks you. you know? how didgood did you know these people is the question that people ask themselves. >> reporter: he knew simpson for some ten years. he didn't know nadir soofi that long. he said he owned a local pizza shop would show up at the