"Columbine" author on Newtown massacre

Microsoft Chairman Bill Gates is number one on the Bloomberg Billionaires Index for the first time since 2007 with a fortune estimated at $72.7 billion.

After years of negotiating, a bipartisan group of House lawmakers say they have a tentative agreement on immigration reform. The group says it still needs to work out details, but that a bill could be on the table by June. Norah O'Donnell reports.

American Airlines will allow early boarding for travelers who don't need to use overhead bins. Norah O'Donnell reports.

Reverend Ian Punnett speaks to the "CBS This Morning" co-hosts about his book, "How to Pray When You're Pissed at God: Or Anyone Else for That Matter."

An airline trade group predicts 209 million people will travel on U.S.-based airlines this summer and international travelers could hit a new record. Gayle King reports.

This summer, millions of cicadas will crawl out of the ground as part of their 17-year mating cycle - which will mean a lot of noise for East Coast residents. CBS News' Jim Axelrod reports.