Donald Trump has sharpened his attacks on Hillary Clinton after her foreign policy speech labeled him a global threat. CBS News political director John Dickerson joins CBSN to discuss. Source

Susan Page of USA Today, Dan Balz of the Washington Post, Amy Walter of The Cook Political Report, and the National Review’s Reihan Salam discuss the presidential contenders’ race to the bottom. With so many challenges facing the American people, both candidates stray from policy to denounce their opponent’s flaws. Source

Eight of nine soldiers killed in a training accident at Fort Hood have been identified. CBS News correspondent David Begnaud joins CBSN with the latest details. Source

Boxing legend Muhammad Ali is dead at 74. Author of “Running With The Champ” and longtime friend Tim Shanahan joins CBSN to share memories he shared with the champ and explains how Ali was as personable outside the ring as he was in it. Source

Before the caps and tassels are tossed, college grads get a commencement send-off speech. These addresses from their supposedly wiser elders are inspiring or humorous. “CBS This Morning: Saturday” looks at some choice examples. Source

You might think there is certainty about concepts like gravity, freedom, and even the color of the sky. But what if we’re wrong? Author Chuck Klosterman tests that theory in his new book, “But What If We’re Wrong?” He joins “CBS This Morning: Saturday” to talk about how history may judge contemporary institutions like rock ‘n’ roll and pro football. Source

Successful giant panda births are very rare, so Brussels zookeepers are calling the new cub “a true miracle.” This is only the third giant panda cub born in the past thirty years. Vladimir Duthiers has more. Source

Joey Alexander plays jazz like a veteran of decades, but he’s just 12 years old. Anderson Cooper reports on the jazz prodigy on Sunday, June 5 at 7 p.m. ET/PT. Source

Smart-gun technology is not new, yet these guns are not mass-produced or sold in the U.S., partly due to fears they are a backdoor to greater gun control. Lesley Stahl reports on Sunday, June 19 at 7 p.m. ET/PT. Source

Top drug official Michael Botticelli says the old war on drugs is all wrong, and wants to refocus the country’s drug policy. Scott Pelley reports on Sunday, June 5 at 7 p.m. ET/PT. Source