We strongly support free trade, but before an agreement can be completed, Americans need reassurance that Mr. Uribe’s government will do more to protect workers’ rights, instead of standing aside as union leaders are systematically killed... In the last 20 years, according to a recent report by the Solidarity Center of the A.F.L.-C.I.O., some 4,000 labor union organizers, leaders and activists have been assassinated...— far more than anywhere else in the world. The government has investigated fewer than 400 cases, and has produced just five convictions... Colombia wants to further cement the special relationship [with the USA] with a free trade agreement. It can begin by treating workers’ rights as human rights.