The two example of Supersonic aircraft are Concorde
developed by UK and France which travelled from NY and London exceeding Mach
(the speed of sound). It was retired following a bad accident. The most famous
supersonic plane is the SR-71 Blackbird spy plane developed by Lockheed. A
supersonic airplane is simply one that is capable of flying faster than the
speed of sound, which is about 760 miles per hour.
That guy ( I won't say his name or they won't let me answer the question ) could have maybe even escaped or bribe some corrupt soldier and you never know if he had some weapons on him and what if he wanted to do a oof on purpose attack by exploding explosives
The founding fathers limited the powers of each branch of government so one doesn't get powerful. If one got too powerful it could lead to a dictatorship, which none of them wanted.