Imran Khan has started his march from Islamabad to Southern Waziristan, a dangerous tribal area of Pakistan currently the target of CIA drone attacks.
The march has been denounced by various Pakistani Taliban factions, but Khan insisted it would go ahead:
This is a peace march, an effort for peace in Pakistan on our part ... We are not going to fight anyone.
More top news
It comes in contrast to other major European countries including Germany, France and Spain where growth exceeded expectations.
Nine people have died and several are in hospital after being discovered in the back of a lorry in a car park in Texas.
The parents of the terminally-ill 11-month-old say there is new evidence they hope will persuade a judge to change his mind.