At least seven are dead and 287 are still missing after a South Korea ferry sank on Wednesday morning. An announcement to stay put was broadcast over the speakers, telling passengers, including 300 high-school students, that "If you move, it's dangerous." Survivors say they put on life jackets and jumped into the water to escape the capsizing vessel. A massive rescue operation has been searching the cold water for missing passengers, but conditions are making the search difficult. Reports indicate that 476 people were aboard the ferry.