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KNOW IT ALL: Monday's Top Stories at NBC News

An exclusive report on American ISIS recruits and other stories we're following today.
Image: A damaged OGA Charters bus is hauled away after a fatal rollover
A damaged OGA Charters bus is hauled away after a fatal rollover on May 14, 2016 in Texas.Danny Zaragoza / Laredo Morning Times via AP

Good morning. Here are some of the stories we're following today:

1. An American ISIS Cell: The Story of 3 U.S. Recruits

Through documents provided to NBC News by an ISIS defector, NBC News has identified at least 15 U.S. citizens or residents who went overseas and joined ISIS. Some were already known as recruits; other names have never been made public before. Over the course of two months, NBC News pieced together the story of a single cell with three members. Read more in NEWS.

2. Priebus on Trump Controversies: 'People Just Don't Care'

Republican National Committee Chair Reince Priebus responded to questions on Sunday about Trump's truthfulness with regard to whether he posed as his own publicist in 1991, as well as whether a New York Times report published on Saturday on how Trump treats women gave Priebus pause. "I've got to tell you, I think that all these stories that come out — and they come out every couple weeks — people just don't care," Priebus said on Fox News. Read more in POLITICS.

3. In Commencement Speech, Obama Attacks Trump's Wall Proposal

President Barack Obama on Sunday denounced the tenor of the presumptive GOP nominee's campaign, without ever mentioning Donald Trump by name, during a commencement speech at Rutgers University. Obama told graduates at the New Jersey school that "building walls" is not the way of the future. "To help ourselves we've got to help others, not pull up the drawbridge and try to keep the world out," Obama said. Read more in POLITICS.

4. Colombia Makes 'Biggest Seizure of Drugs in History'

Police confiscated 8.8 tons of cocaine along the border with Panama, Colombia's government said on Sunday. With an estimated value of $240 million, the haul was discovered in an underground hideaway on a banana plantation in the municipality of Turbo, officials said. Three people were arrested in the operation. Read more in NEWS.

5. All Eight Victims ID'd in South Texas Charter Bus Crash

Texas authorities on Sunday released the names of all eight people who died after a charter bus rolled over on a highway in a crash near the Mexico border that injured more than 40 other people. Most were in their 50s or 60s, but the oldest was 83, and all were Latino Americans, Webb County Judge Tano Tijerina said at a news conference. Read more in NEWS.

6. Fugitive Wanted in Attempted Murder of Cop Is Killed

A fugitive wanted in the shooting of a police officer in Illinois last week was killed Sunday morning after opening fire on authorities and injuring an FBI agent, Illinois police said. Dracy Pendleton, 35, was killed in an abandoned house near the Kentucky border, more than 200 miles south of where he shot a police officer and stole a truck, Illinois State Police said in a statement. Authorities had been chasing Pendleton since May 8. Read more in NEWS.

7. One Dead After Plane Goes Down in California Forest

One person was killed after a plane went down near Mount Wilson in the Angeles National Forest on Sunday, officials said. The Cessna 182 single-engine plane was traveling from Montgomery Field Airport in San Diego to Santa Monica Municipal Airport when it lost contact 17 miles east of Van Nuys, according to a Federal Aviation Authority spokesman. Read more at NBC Southern California.