The Indian Ocean is home to one of the most diverse whale populations in the world – as many as 18 species live there. And no one can get you closer to these hauntingly mysterious creatures than American wildlife photographer Patrick Dykstra. Correspondent Jonathan Vigliotti joined Dykstra as they went swimming with whales in the waters off Sri Lanka. Source

On August 4, 1922, at 6:25 p.m. ET, telephone service across the U.S. and Canada was shut down for one full minute in honor of the late Alexander Graham Bell. Jane Pauley reports. Source

Last fall the NRA publicly demanded that doctors who comment on gun violence to “stay in their lane.” And doctors responded. More than 40 medical organizations have joined forces to confront the 40,000 firearm-related deaths that occur each year – a public health epidemic, they say, that can be addressed. Dr. Jon LaPook reports. Source

CBS News correspondent Janet Shamlian provides the latest on the mass shooting in El Paso, Texas, and CBS News correspondent Dean Reynolds reports from Cincinnati on his way to Dayton, Ohio, where another mass shooting happened overnight. Source

Texas Congressman Will Hurd, the only African-American Republican in the House of Representatives, discusses the mass shooting in El Paso and his decision to not seek reelection. Source

Gunfire at a restaurant in downtown Dayton early Sunday morning left 9 people dead and at least 16 injured, before police killed the gunman. The attack came just hours after a man opened fire at a Walmart store in El Paso, killing 20 people. CBS News correspondent Janet Shamlian has the latest. Source

Susan Page, Amy Walter, Jeffrey Goldberg and David Nakamura discuss what action will follow the mass shootings in Texas and Ohio and the consequences of inflammatory rhetoric. Source

For the Bills, everything in 2019 comes down to specific tendencies from Allen Source

The Ohio Democrat said lawmakers in Washington need to show the country they “don’t always kowtow to the gun lobby” Source

Authorities in El Paso, Texas, are investigating a deadly shooting at a Walmart that left 20 dead and at least 26 others injured. The gunman is in custody and is reportedly cooperating with police. CBS News Radio West Coast correspondent Steve Futterman joins CBSN to discuss the latest briefing from El Paso police. Source