someone s finger or more, not to get too graphic. there s no human interference here with an autonomous aircraft to say little millie is sitting on the doorstep, i shouldn t land here. there s like a 400-foot air space over which people s private property you re supposed to be able to enjoy. that 400 feet, that goes really high. how are these drones going to work? exactly. the law mandates you can use up to that level where you can enjoy the fulfillment of your land. so essentially, you know, if a drone flies over your summer barbecue, can you call the cops isn t the law is murky at this point. i would say possibly yes if that s interrupting the fulfillment of your land. at some point it s going to have to go low enough to land on someone s doorstep. that s huge. there s no law that will allow that at this point. amazon s reaction to these regulatory issues and potential blocks, what have they been s
it s not just officials saying that. if you look at the gate to the airfield, you can see floral tributes and candles left by local russians in tribute to all those polish people who died aboard the aircraft, not just the president, his wife, government officials but all of them. a real message of sympathy and all of it coming from local russians who live around here, kyra. so, nick, there are two possible causes to the crash right now. what do you know? reporter: well, one of them is obviously a dense fog that the plane was flying into and what we have heard from russia s deputy prime minister today is that they can confirm. they say they have hard proof that the pilots were told that the weather was too bad, that they shouldn t land at this airfield. they have hard proof that the pilots did receive the message. nevertheless, the pilots did appear to continue to try to land here.