The US Eagles DLC pack for HAWX will be available on May 7 for PS3 and Xbox 360.
The pack includes the F-4 Phantom II, Blackbird, F-111 Aardvark, A-12 Avenger stealth bomber prototype, and a reconnaissance variant based flyer called the Peak Eagleon which is based on the F-15.
It'll set you back 400 MS Points ($5).
IGN has posted a few shots. Go take a look.