The area off limits to general aviation is called a `` temporary flight restriction '' or TFR . Pilots violating TFRs face possible suspension or loss of their pilot 's license . Pilots face possible suspension or loss of their pilot 's license . In the case of Flight 93, it was not clear whether the pilots were flying into restricted airspace when they took off.
The area off limits to general aviation is called a `` temporary flight restriction '' or TFR . Pilots violating TFRs face possible suspension or loss of their pilot 's license . In the case of Flight 93, it was not clear whether the pilots were flying into restricted airspace when they took off.