WASHINGTON (AP) — Airlines across the U. S. worked to recover from the longest nationwide ground stop in 25 years that canceled more than 2,500 flights Saturday, spread ripple effects around the world, stranded passengers and forced pro and college sports teams to scramble for alternate transportation. New technology being added to the nation’s air traffic control system overloaded antiquated equipment and caused “intermittent” communications and radar gaps, leading to the flight of to...

WASHINGTON (AP) — The leaders of the United States, China and Russia plan to meet Thursday on the sidelines of next week's Asia-Pacific Economic Cooperation summit in China's tech hub of Shenzhen — an unprecedented gathering of the heads of the world's biggest nuclear powers. While the leaders gathering for joint talks will mark a singular moment, analysts say expectations are low that the talks will lead to major breakthroughs and say they will be heavier in symbolism than substance. for...

CAPE CANAVERAL, Fla. (AP) — NASA’s Voyager 1 is about to become humanity’s first object to reach one light-day from Earth as it pushes ever deeper into interstellar space. That’s a mind-blowing distance of more than 16 billion miles (26 billion kilometers) for the spacecraft launched 49 years ago. When Voyager 1 reaches that remarkable milestone on Wednesday, its radio signals will take precisely 24 hours traveling at the speed of light to reach Earth — in other words, one light-day...