Teenager forced to shoot dead polar bear after being stranded on iceberg for two days

"A teenager had to fight off hypothermia as he was stranded alone on a chunk of ice floating out into the Arctic.
But that was not all he had to fight off - as he then had to shoot a prowling polar bear who threatened to attack..."http://www.dailymail.co.uk/news/worldnews/article-1226601/Teenager-shoots-polar-bear-dead-self-defence-stranded-iceberg.html