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1. Voters in South Carolina are heading to the polls in the state's Democratic primary. Polls show Barack Obama leading thanks to strong support from the state's African-Americans. Obama is hoping to re-establish himself as the co-front-runner for the nomination¹ alongside Hillary Clinton.

2. Las Vegas officials are still trying to figure out what caused a rooftop fire at the Monte Carlo Hotel & Casino. Authorities say they are not sure when the 3000-room hotel will reopen. Officials say security escorted most guests inside overnight to retrieve² items they had left behind.

3. An American aid worker had been kidnapped by gunmen in southern Afghanistan. The 49-year-old woman was teaching English and embroidery³ at a nearby girls' school. She was wearing a burqa when she was taken. Her driver is also missing.

4. German born polar bear cub⁴ Flocke, or Snowflake in English, is learning to crawl. Zoo officials say the almost five-week-old cub is in 'excellent condition'. Flocke was taken into care two weeks ago after keepers became concerned her mother was not able to raise her.