aftermath of the attack and sent to cnn by a contact. a cameraman working for cnn subsequently filmed these images for us. munitions experts tell cnn this was a u.s.-made bomb, weighing in at half a ton. the first five digits there are the cage number. the commercial and government entity number. this number here denotes lockheed martin. one of the top u.s. defense contractors. >> we're at the forefront of the science that makes them real. >> reporter: this particular mk-82 is a paveway. a laser-guided, precision bomb. it's targeting accuracy, a particular point of pride for lockheed martin. part of an arms deal with saudi arabia sanctioned and contracted out by the u.s. government. so why does this matter? because the devastation inflicted by the mk-82 is all too familiar in yemen. in march 2016, a strike at a