Luis Elizondo made clear he could not speak on behalf of the government, but strongly implied there was evidence that stopped him from ruling out the possibility that alien aircraft visited Earth.
"These aircraft -- we'll call them aircraft -- are displaying characteristics that are not currently within the US inventory nor in any foreign inventory that we are aware of," Elizondo said of objects they researched.
https://www.cnn.com/2019/04/24/politics ... index.html
In some cases, pilots - many of whom are engineers and academy graduates - say they observed small spherical objects flying in formation. Others say they have seen white, Tic-Tac-shaped vehicles. Aside from drones, all engines rely on burning fuel to generate power, but these vehicles all had no air intake, no wind and no exhaust.
https://www.straitstimes.com/world/unit ... -sightings