Question

The main responsibility of the Transportation Security Administration is to
provide police protection for airline passengers.
maintain secure flight schedules for the airlines.
make sure planes are mechanically ready for flying.
screen passengers for weapons and explosives.

Answer 1

screen passengers for weapons and explosives.

The TSA's primary mission is to protect the traveling public by screening passengers, carry-on and checked baggage, and coordinating other security measures at airports to prevent weapons, explosives, and other threats from being brought onto aircraft.