The SpaceX Falcon 9 rocket is prepared to launch from historic Complex 39A at the Kennedy Space Center, Florida on March 30, 2017. This is the first time that a “flight-proven” booster is used to launch a payload into space. The vehicle is lifting an 11,000 pound satellite for the Luxembourg based company, SES, to provide video, TV and communications services to Latin America, Mexico and the Caribbean. Photo by Joe Marino-Bill Cantrell/UPI