John Cantlie

British Security Minister Ben Wallace told reporters on Tuesday that the government has reason to believe photojournalist John Cantlie is still being held by the terrorist group.

In the second of a promised "lecture series," freelance photographer John Cantlie warns that Western governments "are hastily marching toward all-out war in Iraq and Syria."

The man in the video says he is John Cantlie, a British journalist and hostage. He asks why his government has abandoned him. NPR hasn't independently verified the video's authenticity.