New stadiums: safe at home

Sunday's big game will be more secure, thanks to new security fixes

The nation's 1,700 stadiums and arenas are host to an alarming array of potential dangers, from rogue fans to suicide bombers. Here's a sampling of the latest technologies to make them and you safer. Video-cam systems hooked up to metal detectors

[a] placed throughout the stadium detect suspicious quantities of metal and wirelessly alert guards. Biobriefcases carried by agents in the stands or detectors suspended from rafters

[B] sniff out pathogens like anthrax. Pop-up steel pipes

[c] installed near main entrances stop would-be truck bombers cold. And for Super Bowl like events, SWAT teams located on roofs use surface-to-air missile systems

[d] to shoot down any aircraft that have penetrated no-fly zones.