As military police began a 10-day training program with the U.S. military in Phnom Penh on Tuesday, questions are being raised again over Washington’s ongoing support to Cambodian security forces involved in serious human rights abuses. On January 3, military police officers opened fire with AK-47 assault rifles killing five people and wounding at least 42 more after being deployed to break up a demonstration of mostly stone-throwing garment workers on Veng Sreng Street in the city’s Pur Senchey district.