World War 2 U.S. Airmail Transport Stamp ...

I have an old letter sent from my uncle to my father. My uncle was in the Marine Corps in the Pacific and my father was in France in the Army. The post mark is dated December 26, 1944. My uncle was later wounded on the beach during the battle of Iwo Jima. My father served in Europe until the end of the war. I was wondering if this was worth much if anything. Here is a picture of what I have. Letter is included.

P.S. I'm not sure if this is the right place to post this question, but my earlier questions were moved here so I hope I haven't messed up again.

Thank  You,

Respectfully,

sharkman.