NASA is celebrating the launch of its most advanced Mars rover ever today (July 30), even as engineers tackle a glitch that left the spacecraft in a protective "safe mode" shortly after liftoff.  The Mars 2020 Perseverance rover launched toward the Red Planet at 7:50 a.m. EDT (1150 GMT), riding an Atlas V rocket into space from Cape Canaveral Air Force Station in Florida. The rover experienced minor communications and temperature glitches after launch, but the issues aren't expected to harm the mission as a whole, NASA officials said.