PERIMETER WALL Local Afghan workers perform maintenance on the perimeter wall at International Security Assistance Force Forward Operating Base Bala Murghab, Afghanistan, Oct. 2, 2008. ISAF is assisting the Afghan government in extending and exercising its authority and influence across the country, creating the conditions for stabilization and reconstruction. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 541449-V-NBE85-621.jpg Photo Gallery