When asked if his family back in Sri Lanka were OK, holding back his tears, he answered that two members of his family, including a nine-year-old boy, are missing, their home swept away.

CNN: Tsunami tragedy: Your e-mails

Not long after, Romney came back to domestic policy as he answered a question about Egypt.

FORBES: Did a Promoted Hashtag Foreshadow Romney's Foreign Policy Debate Strategy?

This week Ed Miliband answered the doubts within his own party over whether he has what it takes to lead them back to power.

BBC: Where do Labour stand after 2012 conference?