A lot happened on June 12.  

President Trump met with North Korea’s leader, Kim Jong-un, in Singapore, an event that has come under intense scrutiny. Later that day, a federal judge approved AT&T’s deal to buy Time Warner, a decision that could give rise to a wave of huge media mergers.  

And on that day, top business leaders attended the Yale C.E.O. Summit at the New York Public Library, hosted by Jeff Sonnenfeld, the Yale School of Management’s senior associate dean for leadership studies. What did they think about all the news?