This week: Kaspersky booted from U.S. government computers, the White House voids a Chinese acquisition, Bitcoin takes a tumble, and Facebook announces monetization guidelines.

The U.S. senator from South Carolina is a candidate for the 2024 Republican presidential nomination.

U.S. space exploration inspired a generation of students and innovators, but NASA’s role has diminished, and the number of global space competitors is growing.

The United States Marine Corps Marks 246 years of service. 

Recent killings by U.S. officers have sparked widespread calls for police reform and an end to systemic racism. Here’s how U.S. policing compares with other countries’ approaches.