Keywords: US Navy 060313-N-0380T-005 Machinist Mate 2nd Class David Rivera takes a DNA sample from his mouth with a cotton swab as part of a bone marrow drive.jpg en Norfolk Va March 13 2006 - Machinist Mate 2nd Class David Rivera takes a DNA sample from his mouth with a cotton swab as part of a bone marrow drive aboard the Nimitz-class aircraft carrier USS Carl Vinson CVN 70 U S Navy photo by PhotographerUs Mate 3rd Class Matthew Todhunter RELEASED 2006-03-13 060313-N-0380T-005 Navy http //www navy mil/view_image asp id 32765 U S Navy photo by PhotographerUs Mate 3rd Class Matthew Todhunter PD-USGov-Military-Navy Naval Station Norfolk Aboard USS Carl Vinson CVN-70 Medical tests Cotton swabs |