HOWITZER BLAST U.S. Army Pfc. Erik Park fires a 155mm howitzer in Paktika province, Afghanistan, Sept. 3, 2011. Park is assigned to Battery A, 1st Battalion, 77th Field Artillery Regiment, 172nd Infantry Brigade. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 590362-V-QTX83-923.jpg Photo Gallery