When do you decide that a leader is not fit to govern?

After weeks of speculation over his health, Nigerian President Umaru Yar’Adua has broken his silence saying he’s ‘hopeful of a return soon’.

The President’s been missing, dead, brain-damaged and thriving – all in a matter of weeks.

With Nigeria’s image taking a battering in recent weeks, some are asking if this was the right time to go awol. That’s why Nigerians have been taking to the streets.

He’s says he’s recovering, the people aren’t as confident. So when do you decide when a leader’s time is up?