Akbar Khan survived the Bhopal gas disaster 30 years ago -- but it left him with acute breathing, heart and joint problems. Steam baths are one of the Ayurvedic methods used to treat thousands like him, at a clinic in the Indian city. "It's difficult to photograph a tragedy after so many years," writes AFP's Indranil Mukherjee. "You’re trying to find an original angle and the best lighting to bring out the survivors’ emotions. But at the same time, you have to be extremely sensitive. After all, they’re having to relive the trauma of an event in which they lost a part of their life."