WASHINGTON, Aug. 21 -- Sen. Edward J. Markey, D-Massachusetts, issued the following news release: Letter Text (PDF) Amidst an epidemic of gun violence in the United States, Senator Edward J. Markey (D-Mass.) today led a letter with Senator Elizabeth Warren (D-Mass.) to Steven Dettlebach, Director of the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), urging it to closely examine vending machines equipped with facial recognition that sell ammunition and their place in the federal gun more PR