U.S. deploys aircraft carrier strike group in the Caribbean

Martha Raddatz reports on the dramatic escalation in what Pres. Trump calls his war on drug cartels after the Pentagon deployed an aircraft carrier strike group to the waters off Central and South America; Kayna Whitworth has the latest on the U-Haul truck that backed up toward the gate of a Coast Guard base near San Francisco, prompting federal agents to open fire injuring suspect and a bystander; David Muir shares the story of the brave mother who jumped into action and helped a bus driver save 22 children from a school bus that caught fire; and more on tonight’s broadcast of World News Tonight with David Muir.