Bill Clinton nods off during Martin Luther King tribute

This is the moment former US president Bill Clinton nods off during a service to honour the late Dr Martin Luther King Jr.

Clinton, 61, was caught on camera dozing at Convent Avenue Baptist Church in Harlem, New York on Monday.

He was there to pay tribute to the civil rights leader - famous for his "I have a dream" speech.

It's not the first time Clinton has fallen asleep in public. He has also nodded off at a Mets baseball game and at Ronald Reagan's funeral, according to the New York Post.

Clinton's wife, Hillary Clinton, is campaigning to become the Democrat candidate in the race for the US Presidency.