A Silver Spring man convicted of falsifying immigration documents had threatened to blow up the White House, the U.S. Treasury building, a federal courthouse and a Metro stop, vowing to "slaughter the enemies of Islam," federal prosecutors said Monday in court. Lajqi, an ethnic Albanian who came to the United States through Mexico in the mid-1980s, is a self-described "extremist militant," who said he was trained by Bosnian Muslim rebels, according to court papers. He was angry about American military involvement in Kosovo in the 1990s, and "blamed all Albanian deaths in Kosovo on the United States," the court papers...