HELICOPTER'S HOWITZER A CH-47F Chinook helicopter sling loads a M777 lightweight howitzer to a forward operating base in Spin Buldak in southeastern Afghanistan, Aug. 2, 2009. The howitzer is one of many being relocated to Spin Buldak to support U.S. forces. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 005776-H-BQV90-591.jpg Photo Gallery