and hollingsworth. colleagues were there on the day. we've spoken to two bomb experts who dispute the military's claims there was a significant secondary explosion after the drone strike, code 4 explosive material which the u.s. suspected. one of them said if there was a secondary blast, it most likely was the vehicle gas tank exploding. we have also analyzed the cctv footage that you are seeing right now from the day of zamuri in the office. what is critical to note is a u.s. official with knowledge of the operation who spoke to cnn said the u.s. military never knew who was driving the car. they began following this toyota corolla that zemuri was driving. based on intelligence and chatter from the safe house. the official said they saw this car leave possibly from the same safe house and followed it for the next eight hours before