In the monument level, use a helo and find the rock pillar that has a hole in the top of it. This can be done by lightly holding the Square button and circling until the view centers on it. Then go into it and fly through the icon.
Get F-104J
Get to mach 2.0
Get F-105 Drone
Get a altitude of 50,000 feet during Training Mode.
Get F-14 test bed
Beat Recon Mission 2.
Get F-15 #1
Get 50 Kills.
Get F-15 #2
Get 100 Kills.
Get F-15 C
Finish ACM objectives in Aero Meet.
Get F-15 J
Finish 10 Scrambles.
Get F-2B
Finish 50 Scrambles.
Get F-86 Fighter
Log one hour of flight time in Training Mode.
Get Oh-6
Finish Helicopter Training.
Get Su-27 Fighter
Beat recon Mission 3.
Get the A-10
Finish all ground training objectives during training mode.
Unlock Blue Impulse F-86 Fighter
Go to the Island map and get the Blue Impulse Logo in Free Flight Mode.