Obama surprises Joe Biden with top civilian honour

 President Barack Obama has awarded Vice President Joe Biden the Presidential Medal of Freedom, the nation's highest civilian honour, in a surprise tribute to his White House partner of 8 years.

Obama described the former Delaware senator as "the best vice president America's ever had" and a "lion of American history", during an emotional ceremony to honour the 74-year-old at the White House.

"For the final time as president, I am pleased to award our nation's highest civilian honor, the presidential Medal of Freedom," Obama said.

A visibly overwhelmed Biden said the award was more than he deserved. "Mr President, I'm indebted to you. I'm indebted to your friendship. I'm indebted to your family," he said.

Obama said the tribute will give the Internet one last chance to joke about the "bromance" the two share. "This is an extraordinary man, with an extraordinary career in public service," he said.

The president said that the people of Delaware sent Biden to the Senate as soon as they could, electing him at the age of 29.

"It was eight and a half years ago that I chose Joe to be my vice president. There has not been a single moment since that time that I have doubted the wisdom of that decision. It was the best possible choice, not just for me but for the American people," Obama said.