his phone apparently, takes a cell phone photograph as best they can tell, and 30 seconds before the first blast apparently is on the phone speaking to someone. it's not clear who. at that point, then you see the first explosion take place further up the way, right up here, and this is a short distance to the second explosion. for 18 seconds he's been on the phone. the first explosion occurs. he pauses. remember, there was a 12-second pause, and 12 seconds after this, they say, he has now walked away, leaving his backpack behind. and 10 seconds after he walks away, wolf, is when the second blast occurred right down here. so now we have this clear path that we did not have before of both gathering here, one walking on, the second one walking on, and standing here for four minutes waiting until this blast went off, according to authorities, then leaving his backpack and walking away.