♪ pete: welcome back. this is a fox news alert. the department of homeland security has issued an updated terror bulletin focusing on the threat of weaponized drones and the continuing target of aircraft. will. griff: author of drone warrior bret loco ver low velic. when i was first in iraq i watched that marine unit launch a drone that had a wooden propeller. today i went back in november to mostl mosul and i sw isis using drones for both surveillance and attacking what was iraqi special forces troops at the time. so you are the foremost person on this. how serious is this latest report? >> well, it's definitely serious threat for sure.