Also, toroidal plasmas and other high energy or quantum physics.
However, no one is talking about this Congressional hearing because it’s likely performance art meant to scare and misdirect. There aren’t aliens, but there is a powerful government willing to continue covering up powerful weapons and technology being used exclusively for retaining control and power. These testimonies sound A LOT like beauracrats practiced in the art of exactly that: misdirection.
And it will likely be used to justify fighting with China in the near future over nebulous claims of “weapons of mass destruction” being used by China in collaboration with the “aliens” against Americans. (giant eyeroll)