NASA is inviting social media users to apply for credentials to see the progress being made on sending humans to Mars. Up to 100 lucky users will be selected to visit NASA in-person on Aug. 18 at the Michoud Assembly Facility in New Orleans, Louisiana, and at the Stennis Space Center near Bay St. Louis, Mississippi, for behind the scenes tours and to see the mighty RS-25 engine test firing. To apply visit go.nasa.gov/29PclQS #journeytomars #martians #explorenasa #socialmedia #rocketfiring #nasasocial