The Baltimore Ravens reclaimed the greatest prize in North American sports after a dramatic 34-31 Super Bowl victory over San Francisco 49ers on Sunday.

Inspired by their power-packed quarterback Joe Flacco, the Ravens survived a ferocious comeback from the 49ers and a bizarre power outage that stopped the game for more than half an hour to win their second Super Bowl.

John Harbaugh, the head coach of the Ravens, won the most anticipated sibling rivalry in American team sports against his younger brother Jim, who holds the equivalent job with the 49ers.

And Ray Lewis, the combative 37-year-old Ravens linebacker destined for the Hall of Fame, ended his 17-season career with a second Super Bowl title, 12 years after he won his first.

“What better way to go out?” said Lewis.

“We did it! We did it!”

The game, at the Superdome in New Orleans, was preceded by one of the most poignant moments ever witnessed in the 47 editions of the Super Bowl when a choir from Sandy Hook Elementary School joined Jennifer Hudson in a stirring rendition of “America the Beautiful”.

The 70,000 spectators rose to their feet, many with tears in their eyes, as the children sang, nearly two months after the deadly shooting rampage at their Connecticut school.

“Our wish is to demonstrate to America and the world that, ‘We are Sandy Hook and we choose love’,” the school said in a statement.