Photograph by President Obama's photographer, Pete Souza Pete Souza hide caption

itoggle caption Pete Souza

In October, soldiers with the 101st Airborne Division on patrol in eastern Afghanistan's Kunar province climb the hills and footpaths near the Pakistan border. This volatile border has been a source of constant friction as insurgents pass freely through the mountainous region. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR