Since 2016, dozens of American officials have come home from Cuba and China with unexplained brain trauma. Evidence shows it may be the work of another government using a weapon that leaves no trace Source

Texas shooting marks 38th mass killing this year; August ends with another mass shooting in Texas Source

One of the top medical schools in the United States is going tuition-free. Lesley Stahl reports on how and why they’re doing it Source

Odessa, Texas, was the scene of this year’s 38th mass killing. That number includes incidents where more than three people have been shot and killed. As the nation struggles with what to do, 10 new gun laws “easing” restrictions took effect Sunday in Texas. David Begnaud reports. Source

President Trump called Saturday’s mass shooting a “wicked attack,” but did not say he would support any new gun control laws. Ben Tracy reports. Source

News of a gunman on the loose spread fast on social media Saturday, causing chaos and fear. Pictures and videos warned people about the threat faster than law enforcement could. Mireya Villarreal reports. Source

“Imagine an avalanche coming down after you.” Big wave surfer Garrett McNamara tells Anderson Cooper what it’s like to ride a giant wave. Source

Here’s a look at the top stories making headlines on the “CBS Weekend News” anchored by Elaine Quijano. Source

David Nakamura, Salena Zito, Sahil Kapur and Shane Harris discuss the administration’s preparations for the arrival of Hurricane Dorian. Source

Investigators say the suspect doesn’t have any terrorist ties Source