those are surface to air missiles designed to stop a 9/11 style attack, and they're on brian whelan's roof. >> this is the tower that sticks out right above my apartment. as you can see there's a high velocity missile battery on the roof. >> reporter: whelan says they make him feel less safe. >> it makes me feel like a target. it makes me worry about what goes wrong. >> reporter: but today a judge rejected those worries and said the military needs those missiles there, and on five other residential sites to protect the games. in all $2 billion worth of security is being rolled out. air force jets. tens of thousands of additional police to help protect one of britain's largest transit systems. even britain's largest warship will be deployed inside the city. the british military will deploy more troops to protect the olympics, 13,000, than it deploys to afghanistan, it's the largest military presence in london since world war ii. in the last week, with security so tight, london police made six terror-related arrests. it turns out, none had a direct link to the games. police, and the peo