Federal authorities are digging deeper into the life of Muhammad Youssef Abdulazeez who killed five service members last Thursday. The FBI raided an apartment Monday night to learn more about the 24-year-old. A source close to the family says Abdulazeez struggled with substance abuse. Jericka Duncan reports. Source

Hot and humid conditions will impact millions of Americans Tuesday, as a swath of warm temperatures stretch from the southern Plains to the East Coast. The extreme heat has not only been causing power outages and travel delays, but also been downright unbearable — and dangerous. Vladimir Duthiers reports. Source

Nick Dietz compiles some of the latest and greatest viral videos, including Hattie Cat confirming she is happy through song and Chinese kindergarteners performing a mesmerizing basketball dance. To see these videos in their entirety, click HERE. Source

The Ohio governor will be the last Republican to enter the 2016 race to the White House Source

High cost of housing the mentally ill in prisons has some communities rethinking their approach Source

Country music power couple Miranda Lambert and Blake Shelton have announced they’ve filed for divorce. CBSN’s David Begnaud has their statement. Source

We often hear it takes 8 glasses of water a day to stay healthy and hydrated, but new research has come up with a different recommendation. Experts say what you eat makes a difference, too. CBS News’ Weijia Jiang reports. Source

A video of 3-year-old Riley Curry dancing to “Nae Nae” has gone viral. CBSN’s Vladimir Duthiers and Elaine Quijano take a look. Source

New details on Bill Cosby’s sexual assault scandal emerged over the weekend, after The New York Times discovered a loophole and published additional excerpts from a deposition the comedian gave in 2005. Cosby explained in detail how he seduced women and kept his wife in the dark. Don Dahler reports. Source

Nick Dietz compiles some of the latest and greatest viral videos, including five Alaskan Malamute puppies mesmerized by music and a cat that tries to act tough and fails miserably. To see these videos in their entirety, click HERE. Source