Al Qaeda has claimed responsibility for the August kidnapping of an American aid worker in Pakistan and refused to release the 70-year-old man until a list of demands are met.

Warren Weinstein was taken by armed men from his house in the eastern city of Lahore on Aug. 13.
  
He'd been working on a project in areas where Pakistani troops were battling Islamists and was just days away from returning home when he was abducted.
  
In an audio message posted on a militant website, al Qaeda leader Ayman al-Zawahri said the hostage would be released if the United States ceased air strikes in Afghanistan, Pakistan, Somalia and Yemen.
  
He also demanded that all al Qaeda and Taliban suspects around the world be released.

"Just as the Americans detain all whom they suspect of links to al Qaeda and the Taliban, even remotely, we detained this man who is neck deep in American aid to Pakistan since the 1970s," al-Zawahri said.
  
Weinstein is reportedly in poor health.  J.E. Austin Associates, the company he worked for, provided a detailed list of medications that it implored the kidnappers to give him.