Hurricane Simon has strengthened to a Category 2 storm, approaching Mexico's coast as a major hurricane this weekend, according to the National Hurricane Center. On Friday, maximum sustained winds increased to nearly 100 mph, with Simon expected to strengthen rapidly.…

Four astronauts are back on Earth after an eight-month stay at the International Space Station. Their SpaceX capsule splashed into the Pacific on Thursday. The U.S., French and Russian astronauts said before leaving the orbiting lab on Wednesday that they'll…