doug hughes , 61 , steered his small gyrocopter through protected washington airspace for 30 miles to the u.s. capitol .
rep. jason chaffetz said hughes ` should have been blown out of the air '
chaffetz said security tracked hughes as he approached the capitol last week after taking off from gettysburg , pennsylvania .
a ` judgment call ' was made not to shoot hughes down , chaffetz said .
rep. elijah cummings said officials were concerned about injuring people on the ground if an attempt was made to shoot down hughes .
hughes landed the gyrocopter on the west lawn .
he was charged with two federal crimes , violating restricted airspace and operating an unregistered aircraft .