The military wants any control over such craft as they want the technology, which is why in almost every case a ship lands or crashes it is always secured and shipped off to a non disclosed military base to be studied. Thousands of videos on the web showing aliens and ships both. Some are really disturbing such as Jane and Scott in Washington that encountered and alien that killed them (it was recorded as they were taping their hiking trip), anyways don't watch it if you are easy to scare. Then there are videos of good aliens who one had a personal meeting with using hand gestures to communicate, then the 64 children and some teachers watched a ship land in the school yard and talk telepathic to the children and warn them to take better care of this world. Just two cases of thousands upon thousands, including the mass sightings in Mexico (worth watching) of hundreds of ships crossing the skies. It is pretty hard to deny such hard evidence, even when a lot of it is from the military itself and they don't get paid to make stuff up.