something. we assessed whether they posed any kinetic threat to people on the ground. they did not. we assessed whether they were sending any communication signals. we detected none. we looked to see whether they were maneuvering or had any row pull shop capabilities. we saw no signs of that. reporter: here is what we know so far about the objects in the sky. according to u.s. officials, the object shot down ten miles off the coast of alaska on friday was a metallic object that broke up into several pieces when fell to the sea ice from 40,000 feet. the second object shot down over the yukon territory appeared to be a balloon with a metal payload hanging underneath. according to a memo monday, it crossed near sensitive u.s. sites at 40,000 feet before it was downed. and the third object shot down sunday afternoon over lake huron was described as an octagnal ol.