Flowers placed by families of those killed in July 7 bombings sit in front of a map at Edgeware Road Underground station in London. Flowers placed by the families of those killed in the July 7 bombings sit in front of a map at Edgeware Road Underground station in London July 24, 2005. Police on Sunday defended a policy of shooting to kill suspected suicide bombers despite killing a Brazilian electrician by mistake in the hunt for attackers who tried to set off bombs in London. REUTERS/Linda Nylind/The Guardian/Pool