There is no confirmed evidence in favour of this.
No.
using UFOS
Unidentified Flying Objects have been everywhere in the thousands. Alien UFOs? Probably not. You'll know someday, but for now, it's all a complete guess.
Most pictures of UFOs or Aliens are fake. So far, none of the alien photos have been shown to be anything but fake. So far, none of the UFO photos have been proven to be alien spacecraft. For some reason people call alien spacecraft, "UFOs". even though UFO just means "thing in the sky that I don't know what it is".
Alien Paranormal Bigfoot UFOs and the Men in Black - 2013 was released on: USA: 1 June 2013
Chasing UFOs - 2012 Alien Castaways 1-7 was released on: USA: 10 August 2012
Chasing UFOs - 2012 Alien Cowboys 1-3 was released on: USA: 6 July 2012
UFO is short for Unidentified Flying Object, not "Alien Spacecraft". People do see things they themselves cannot identify; in that sense UFOs are real, not just possible. Alien spacecraft are possible, but neither aliens nor aliens with spaceships, are in real life, known to exist. Someone has to be the first form of intelligent life in the universe; there is no reason whatsoever to think it isn't us.
Yes. A UFO is anything unidentified. It may/may not be a saucer or extraterrestrial in origin.
Chasing UFOs - 2012 Alien Baby Farm 1-8 was released on: USA: 17 August 2012
Yes, UFO does not mean alien spaceship, it means Unidentified Flying Object. If you meant alien spaceship, then I would say yes, no, maybe so, but I do believe in Aliens.
Unsealed Alien Files - 2012 II Soviet UFOs 2-5 was released on: USA: 30 September 2013