If you were going to invest now in your future self, what would you focus on? One of the world’s longest running health studies sought to find the answer. The Harvard study of adult development began in 1938. It followed two groups of young men, some from inner city Boston and others who studied at Harvard. Their lives gave researchers evidence that our relationships with others keep us happy and healthy. Dr. Robert Waldinger, the fourth director of the study, joins “CBS This Morning” to discuss the findings. Source

Defense Department researchers announced the arrival of a “nightmare” bacteria in the U.S. They say the superbug is resistant to one of our strongest antibiotics. The head of the CDC says, “It is the end of the road for antibiotics unless we act urgently.” Dr. David Agus joins “CBS This Morning” to discuss the threat. Source

Skellig Michael is an island seven miles off the coast of Ireland with a history dating back to the dawn of civilization. But that’s not what has tourists flocking to the island these days. Mark Phillips has more. Source

Hulk Hogan received nearly $10 million from PayPal founder Peter Thiel to pay his legal fees in his lawsuit against the website Gawker. Hogan sued the gossip blog for publishing video of the pro wrestler having sex with a friend’s wife. He was awarded $140 million earlier this year. John Blackstone has more. Source

More than 20 million Americans across the Southern Plains are facing the threat of tornadoes and flash floods Thursday night. Omar Villafranca has more. Source

Hillary Clinton is downplaying the findings of a State Department audit, the latest development in the scandal surrounding her emails. The report was highly critical of her use of a private email account and server as secretary of state without seeking permission. Nancy Cordes has more. Source

Donald Trump has clinched the Republican nomination with help from members of North Dakota’s GOP convention delegation. But Trump is still facing pockets of party resistance. Major Garrett has more. Source

Donald Trump reached a milestone today, securing at least 1,237 delegates, the minimum number needed to become the Republican Party’s presidential nominee, CBS News estimates. Trump spoke to reporters after hitting this turning point in the campaign. Watch his full remarks. Source

Video shot by the U.S. military in 1945 shows Hiroshima after it was hit with an atomic bomb. Around 140,000 people died in the bombing. President Obama will become the first sitting U.S. president to visit Hiroshima on Friday. Source

Hollywood is ready for an eye-popping summer with the newest chapter of the X-Men franchise opening Friday. “X-Men: Apocalypse” will go head-to-head with another sequel, “Alice Through the Looking Glass,” starring Johnny Depp. The two premieres have Hollywood hoping for a powerful Memorial Day weekend at the box office. New York Times reporter Melena Ryzik and ScreenCrush.com editor-in-chief Matt Singer join “CBS This Morning” to preview this summer’s most anticipated movies. Source