Chinese Defense Minister Li Shangfu told Asia's top security summit on Sunday that conflict with the US would be an "unbearable disaster" but that his country sought dialogue over confrontation. Li said the world was big enough for China and the US to grow together in remarks made days after he refused to meet his US counterpart for direct talks. Ties are badly strained over a range of issues, including President Joe Biden's restrictions on semiconductor chip exports, a democratically governed Taiwan, and territorial disputes in the South China Sea.

IS CHINA PLAYING A GAME OF HIGH-STAKES CHICKEN WITH US?

Railway teams worked non-stop Sunday restoring tracks after India's deadliest train crash in decades, a tragedy that has reignited safety concerns about one of the largest networks in the world. Prime Minister Narendra Modi, who has pushed a $30 billion railway infrastructure modernization in a bid to boost India's economy and connectivity, viewed the mangled wreckage and offered condolences to the families of the nearly 300 killed and 900 injured in the triple-train crash.

WHAT EXPERTS LEARNED ABOUT THE CAUSE OF THE CRASH

The US scrambled F-16 fighter jets Sunday in a supersonic chase of an aircraft with an unresponsive pilot that violated airspace in Washington D.C. and later crashed in the Virginia mountains. The jets prompted a sonic boom over the U.S. capital in an attempt to pursue with the errant Cessna Citation, which was flying on autopilot with four people on board. The U.S. military attempted to establish contact with the pilot before the Cessna subsequently crashed near a national forest.

GET THE LATEST ON THE BIZARRE PLANE CHASE AND CRASH

When and where was the deadliest train disaster in world history?

Friday's answer: The Human Genome Project identified 3 billion letters in sequencing human DNA. It would require someone typing 60 words a minute for eight hours a day about 50 years to complete the thread.