ISLAMABAD (AP).- A London gallery opened a photo exhibit Tuesday that allegedly shows innocent civilians killed by U.S. drone missile strikes in Pakistan’s tribal region along the Afghan border. U.S. officials do not publicly acknowledge the CIA’s covert drone program, but they have said privately that the strikes harm very few innocents and are key to weakening al-Qaida and other militants. “I have tried covering the important but uncovered and unreported truth about drone strikes in Pakistan: that far more civilians are being injured and killed than the Americans and Pakistanis admit,” said Noor Behram, a 39-year-old photographer who has worked with several international news agencies. Behram spent the last three years photographing the aftermath of drone strikes