Kerry Khan

Over the weekend, the U.S.

's most advanced aircraft carrier arrived in the Caribbean, joining nearly a dozen other U.S.

naval warships there.

In Venezuela, Maduro repeatedly called for peace at a rally over the weekend and on state TV, praying with religious leaders.

On social media, leading opponent Maria Corina Machado urged Maduro's security apparatus to lay down its arms and join her independence movement.

Carrie Khan, NPR News, Bogota, Colombia.