Martha Raddatz has the latest on the deadly gun battle off the coast of Cuba that killed four people and wounded six more aboard a Florida-registered speedboat; Pierre Thomas reports on Microsoft co-founder Bill Gates apologizing for his relationship with convicted sex offender Jeffrey Epstein and admitting to having affairs with two Russian women; David Muir shares the story of Punch, the seven-month-old macaque monkey at Japan’s Ichikawa Zoo who attached himself to a stuffed orangutan after being abandoned by his mother; and more on tonight’s broadcast of World News Tonight with David Muir. 00:00 Intro 02:39 Cuba: 4 shot dead on Florida-registered speedboat after crew on board fired at troops 05:07 Surge in tips after Guthrie family offers $1 million reward for mother's return 07:03 Bill Gates apologizes for Epstein association, admits to having affairs with 2 Russian women 09:09 Massachusetts home explosion seriously injures mother, 2-year-old daughter 10:29 Heavy rain headed f...