It also affected air travel and I think he might have needed permission,
because it is a 'aircraft'.
They are concered about these flying objects,
because some airports have had near hits with model rockets buzzing the airliner cockpit.
Continental airliner buzzed by enthusiast model rocket? - Gadgets
Model rocket buzzes Continental jet claims authorities - Rocketry Planet
FBI officials have been called in to assist the Federal Aviation Administration
(FAA) in its investigation concerning a mid-air incident that recently took
place between an outbound Boeing 737 jetliner and an enthusiast’s
homemade rocket.
The near miss was revealed on Monday when a Continental Airlines pilot
reported to shocked air-traffic controllers in Houston that a projectile with a
flaming tail had hurtled past the plane’s cockpit shortly after takeoff from
George Bush Intercontinental Airport.
“We don’t know for sure what the object was. But we think it might be
somebody doing model rocketing,” commented FAA spokesman Roland Herwig
in a Houston Chronicle report. “The pilot saw the rocket and some people
saw the rocket’s trail.”