NASA's upcoming landing of the first-ever mission to study the heart of Mars will be the topic of a media briefing at 1:30 p.m. EDT Wednesday, Oct. 31 at NASA Headquarters in Washington. The briefing will air live on NASA Television, the agency's website and the NASA InSight Facebook page. NASA's InSight Mars Lander (Interior Exploration using Seismic NASA's upcoming landing of the first-ever mission to study the heart of Mars will be the topic of a media briefing at 1:30 p.m. EDT Wednesday, Oct. 31 at NASA Headquarters in Washington. The briefing will air live on NASA Television, the agency's website and the NASA InSight Facebook page. NASA's InSight Mars Lander (Interior Exploration using Seismic