U.S. Army Pfc. Aaron Birmingham, an infantryman with 1st Platoon, Company D, 2nd Battalion, 2nd Infantry Regiment, 3rd Brigade, 1st Infantry Division, Task Force Duke, from Alpena, Mich., keeps on eye on a wadi in Andar, Afghanistan, April 21. The area is known as a Taliban stronghold and is where the unit received small arms fire earlier in the month. (Photo by: Staff Sgt. Andrew Guffey)