FILE - In this March 23, 2007, file photo, Robert White, former U.S. ambassador to El Salvador, speaks during a news conference in San Salvador. White died Tuesday Jan. 13, 2014, of cancer. He had spent 25 years in the U.S. Foreign Service and was ambassador to El Salvador from 1980-81. (AP Photo/Luis Romero, File)MEXICO CITY (AP) — Robert E. White, a former U.S. ambassador to El Salvador and strong critic of U.S. policy in the region during the Central American wars, has died at age 88, according to the Washington-based Center for International Policy where he was a senior fellow .