Inside the troubled nuclear power plant, officials knew the risks were high when they decided to vent radioactive steam from a severely overheated reactor vessel. They knew a hydrogen explosion could occur, and it did. The decision still trumped the worst-case alternative -- total nuclear meltdown.
NFL labor talks broke down just hours before the latest contract extension expired Friday. The union decertified, and players including Tom Brady and Peyton Manning sued the league, putting the country's most popular sport on a path to its first work stoppage since 1987.
(UPDATED AT 7:52 P.M.) A ferocious tsunami unleashed by Japan's largest earthquake ever slammed into its eastern coast Friday, killing hundreds of people as it carried away ships, cars and homes and triggered widespread and uncontrolled fires.