The probe fell out of the sky from more than a mile up, impacted the ground at more than 185 mph, and catastrophically blew up with its tanks full of fuel.
The lander was released from the orbiter as planned; the parachute opened as planned; the forward heat shield released as planned; the rear heat shield (and parachute) released as planned; but apparently, the retro jets to slow the lander to a safe landing speed did not function and the lander crashed into the surface of Mars.
To date, there have been 18 attempted landings; 8 have been successful. Current proposals would place man on Mars somewhere between 2037 and 2040. Any volunteers?