Rear Admiral Edward K. Walker, Jr., USN (Ret) and the staff of the US Navy Memorial place a wreath at the statue of the Lone Sailor in Washington DC on Tuesday August 9, 2011, in honor of Navy SEALs Team Six killed in action. More than 20 Navy SEALs from SEAL Team Six were among those killed the previous Friday in a helicopter crash flown by a crew of the 160th Special Operations Aviation Regiment. SEAL Team Six was the unit that carried out the raid that killed Osama bin Laden in his Pakistan hideout.