Britain's Cameron: 'A Great Light Has Gone Out'

British Prime Minister David Cameron on Thursday said "a great light had gone out" following Nelson Mandela's death, revealing that flags would be flown at half-mast at his Downing Street Office.

"A great light has gone out in the world," Cameron wrote on his official Twitter account.

"Nelson Mandela was a hero of our time. I've asked for the flag at No.10 to be flown at half mast."