launch falls off in landing sends pulses to the surface to measure speed and also distance. then the vehicle has to rotate out of the way to the parachute in the back shell don't follow on it using rockets to study the landing. >> what an exciting day. i almost can't wait. i'm really excited. landing on mars is never a foregone conclusion must have the time we tried to get into orbit or land on mars we have not been successful. >> and excitement around 3:00 p.m. on monday, viewers expected to gather and watch parties across the country but you can watch it live from your home. nasa will be broadcasting the whole thing online. arthel: fascinating, thank you. eric: the deadliest wildfire ever is distinctly now fully contained. the recovery efforts is far from over. rescue crews crews are now up