If they are ours...the likelihood is that they are drones.
For, the G-forces and sudden change of direction aren’t compatible with humankind.
Of course, why would a drone need to be 1 mile long and a half mile wide?
Supposedly there’s t least a reason or two involved with the type of propulsion and/or other technologies onboard the ship which cancel out inertial G force problems.
Quite beyond my expertise! LOL.
However, some of the ET’s are quite light.
And, some abductees have reported being encased totally in a liquid filled capsule for their own safety.
SOMETHING UP?
Observations at an Airbase in Lousianna
http://www.abovetopsecret.com/forum/thread371707/pg1