U.S. Defense Secretary Pete Hegseth and Air Force Gen. Dan Caine, chairman of the Joint Chiefs of Staff, have arrived in Puerto Rico as the U.S. steps up its military operations against drug cartels in the Caribbean. The arrival comes more than a week after ships carrying hundreds of U.S. marines deployed to Puerto Rico for a training exercise. Puerto Rico's Gov. Jenniffer González said Hegseth and Caine visited the U.S. territory on Monday to support those participating in the training. The visit comes as the U.S. prepares to deploy 10 F-35 fighter jets to Puerto Rico for operations targeting drug cartels.