The Extreme Universe Space Observatory on a Super Pressure Balloon (EUSO-SPB1) was launched April 24th 23:51 UTC 2017 from Wanaka, New Zealand as a mission of opportunity on a NASA super pressure balloon test flight planned to circle the southern hemisphere. The primary scientific goal was to make the first observations of high energy cosmic ray extensive air showers by looking down on the atmosphere with a UV fluorescence detector from the near space altitude of 33~km. After 12~days 4~hours aloft, the flight was terminated prematurely in the Pacific Ocean about 300~km SE of Easter Island. This overview presentation of the EUSO-SPB1 program will review the science of the mission, the instrument, the flight, and first looks at data. Preparations for a EUSO-SPB2 mission are underway.