"Neither Mason, a U.S. Army Special Forces medic, nor Lisette, a foreign correspondent, has emerged from America's long post-9/11 wars in Iraq and Afghanistan unscathed. Yet war also exerts a terrible draw that neither can shake--the noble calling, the camaraderie, the life-and-death stakes. Where else in the world can such a person go? All roads lead to Colombia, where the US, with its patented fusion of intelligence dominance and quick-striking...