Cori Bush, a nurse and Black Lives Matter activist, has ousted longtime Missouri U.S. Rep. William Lacy Clay in a Democratic primary, The Associated Press projects.

It's the latest example of a progressive challenger topping a long-tenured Democratic incumbent.

Clay has represented the state's 1st Congressional District, around St. Louis, since 2001. He succeeded his father in representing the district.

Three stranded mariners were rescued from a remote island in Micronesia on Monday after search crews spotted their "SOS" message written in the sand.

The three-person crew of a skiff had not been heard from since July 29, and were reported missing on July 31. The mariners were reportedly sailing a 23 nautical-mile journey from Pulawat to Pulap atolls in the Federated States of Micronesia, in the western Pacific, when they sailed off course and ran out of fuel.

Kansas Rep. Roger Marshall is projected to defeat former Kansas Secretary of State Kris Kobach in the Republican Senate primary, according to the Associated Press, calming Republicans' worst fears about putting a seat in a deep red state in play this fall with the Senate majority contested.

With Mississippi on track to become the number-one state for new coronavirus infections per capita, Gov. Tate Reeves is implementing a temporary mask mandate and delaying the reopening of schools in certain counties.

Reeves announced the new measures at a press conference on Tuesday.

An enormous explosion shook Beirut, Lebanon, on Tuesday. At least 70 people are dead and at least 2,700 people were hurt, according to Minister of Health Hamad Hassan. The death toll is expected to rise as officials search for people who have been reported missing.

Buildings collapsed and glass shattered as helicopters and firefighters doused the flames in the city's port. Hospitals were overwhelmed, and ambulances lined up to work on search-and-rescue operations.

Six states led by a bipartisan group of governors are joining together in an effort to speed up coronavirus testing. As the nation's death count continues to rise above 150,000, the states said they will jointly purchase 3 million rapid antigen tests that can quickly detect the virus.

Illinois State University on Tuesday pointed to the unexpected loss of on-campus testing capacity and rising cases as major reasons why classes will be primarily online this fall.