The briefing will be held in James E. Webb Auditorium at NASA Headquarters, located at 300 E St. SW in Washington. NASA Television and the agency’s website will carry the briefing live. Participants in the briefing will be: Media and the public also may ask questions during the briefing on Twitter using the hashtag #askNASA. For NASA TV streaming video, scheduling and downlink information, visit: http://www.nasa.gov/nasatv