It is essential to research NASA before your interview. Through that research, be sure to study some of their competitors and why you feel NASA stands out from the crowd. Visit the 'Technology' and 'History' section on the organizations' website to find out details.
"I know that there is some competition between NASA and SpaceX, and perhaps even the ISRO (Indian Space Research Organization) however, after reviewing your website, a few recent articles, and seeing your multitude of awards I feel that working for NASA would be a real honor and great step in my career. You stand out from the crowd for being the first in many breakthroughs and being an incredibly strong branch of the US government."
"The NASA organization stands out in many ways. What impressed me the most was your safety record, employee tenure, and growth opportunity. When it comes to your competitors, such as SpaceX and the ISRO, would you agree that these are stand-out areas for you? I would love to hear more about NASA's competition plan."