U.S. Air Force Technical Sergeant Kenneth O’Brien is used to stepping up to help others in danger Source

Memphis welcomes in Navy on Thursday for a huge American Athletic Conference opener Source

Nemesio Cervantes, known as El Mencho, has a $10 million bounty on his head Source

In a detailed complaint, a whistleblower said White House officials worked to “lock down” records of Trump’s call this summer Source

Under the new proposed ceiling for fiscal year 2020, the U.S. would admit no more than 1,500 refugees from Honduras, El Salvador and Guatemala Source

Many may not know his name, but a Mexican drug lord known as El Mencho is responsible for at least a third of the drugs entering the U.S. There’s a $10 million bounty on his head. Adriana Diaz takes a look at El Mencho’s impact in the U.S. Source

Also, watch SportsLine on CBS Sports HQ live at 6 p.m. ET for all today’s best bets Source

The labor-focused, progressive Working Families Party is backing Elizabeth Warren over Bernie Sanders for the Democratic presidential nomination. Maurice Mitchell, the national director of the Working Families Party, joined “Red & Blue” to discuss why his party endorsed Warren and what the reaction has been like. Source

Here’s a look at the top stories making headlines on the “CBS Evening News with Norah O’Donnell.” Source

Wait, is the former NFL QB actually going to do this? Source