I've been in the Air Guard for seven years, and the only military aircraft I've ever had a ride in was an Army UH-60. It's nigh on impossible to get a ride on an aircraft around here what with the wings that don't spin in circles. The "Space Available" program for rides requires the pilot to actually release seats on said flights, and since most flights are for official training purposes, no seats are released for people that don't need to be on the mission.