North Korea's Real-Life 'Doomsday Scenario' For U.S.

High-altitude EMP blast WASHINGTON – A congressional subcommittee on homeland security heard the bad news late last week from two experts who have been studying America's vulnerability to an existential threat – a real-life "doomsday scenario." The threat of a North Korean nuclear attack on the U.S. is almost unimaginably worse than turning a city like…