DR. BIDEN VISIT Jill Biden, center back, wife of Vice President Joe Biden, meets with wounded warriors, their families, and staff members at the Palo Alto Polytrauma Rehabilitation Center, a part of the Department of Veterans Affairs, in Palo Alto, Calif., Jan. 18, 2012. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 061937-T-BTF38-395.jpg Photo Gallery