U.S. Secretary of State Hillary Clinton on Tuesday urged Venezuela to be transparent on its weapons purchases as she and President Tabare Vazquez of Uruguay expressed concern about a regional arms race. “We have expressed concern about the number of Venezuelan arms purchases. They outpace all other countries in South America,” Clinton told reporters during a joint news conference with Vazquez. “Certainly, [they] raise the question as to whether there is going to be an arms race in the region.”