Robot Traffic Officer Goes on Duty in China's Zhejiang

China's Self-Developed Reusable Rocket Achieves Key Breakthrough in Maiden Flight: Mission Leader

How China Battles Heavy Snow to Ensure Transportation Safety

A freeway north of Los Angeles was closed for hours and a shelter-in-place order was issued to more than 19,000 residents in Castaic after a natural gas line ruptured on Saturday afternoon. The 5 Freeway is a major artery that links Southern California to the rest of the state. It's unclear what caused the gas line to rupture, but Los Angeles County Sheriff's Department deputies told CBS Los Angeles that it was possibly caused by a mudslide. #california #southerncalifornia

Closing of the Holy Door at the Jubilee Year by Cardinal James Harvey

Open, Closed, and Isolated Systems Explained | Class 11 Physics | Thermodynamics