By Mark Drajem
Workers in Colombia face legal hurdles to organizing unions and are often threatened with violence, according to a U.S. government report that may raise questions about a recent trade agreement with the Andean nation.
``Labor leaders continued to be targets of attacks by illegal armed groups, primarily for political reasons,'' the State Department's annual report on human rights said. ``Union leaders contended that perpetrators of violence against workers
operated with virtual impunity.''