A regime in this country wore black uniforms and red-and-white checkerboard scarves called krama. In an interview with journalist Nate Thayer, this country's former leader denied having “Comrade Ya” tortured and killed at a facility named for poison trees. The Santebal, this country's secret (10[1])police force, disappeared many (10[1])of its “New People” from urban centers. A dictator of this country known as “Brother Number One” (10[1]-5[1])established the “Year Zero” ideology, which targeted people for wearing glasses. (10[2])From 1975 (-5[1])to 1979, more than a million citizens of this (10[1])country were murdered (10[1])in its “Killing Fields.” For 10 points, name this country once ruled by Pol Pot’s Khmer Rouge. ■END■ (10[2])