A group of Americans have defied warnings over safety to travel to Pakistan and join a march protesting against US drone strikes.
It is to start in Islamabad and end in South Waziristan, a tribal region bordering Afghanistan that’s seen many attacks.
It is thought hundreds of drone strikes have killed thousands of people, many of them civilians.
The US argues the strikes help win the war against al Qaeda. Activists say they are counter-productive.
“This is a culture (in Waziristan) that very much believes in revenge and then they seek revenge by trying to kill Americans. So we are just perpetuating a cycle of violence,” said peace activist Medea Benjamin.
The US gives little details of its drone operations. Researchers believe civilian men in particular have continued to be killed under the Obama administration.
The Taliban has criticised the march. Reports speak of suicide bombings being planned. The march organiser, cricketer-turned-politician Imran Khan, has been threatened.