CANADIAN MINISTER Defense Secretary Robert M. Gates, right, escorts Canadian Defense Minister Peter MacKay through an honor cordon into the Pentagon, March 22, 2010. The two North American defense leaders will hold security discussions on a number of issues, including their NATO deployments in Afghanistan and efforts to combat the effectiveness of improvised explosive devices. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 958190-B-PGL02-050.jpg Photo Gallery