completed a series of history making events. reporter: a key objective is to test the heat shield. it is moving 24,000 miles an hour, 7 miles a second. the heatshield will get 5000 °. they are trying to skip reentry. the capsule will enter the s for, bounce back up, to reduce the heat and the g forces on the astronauts on reentry. 11 parachutes are going to slow this thing down to 20 miles an hour before it hits the water. recovery vessels, several navy ships, are there to bring in the orbiter if you will. the cost of this about $93 billion for all four of these missions. in 2,024, four astronauts will go up. the following year they will land on the moon. by 2027 we hope to have a lunar lander up there to prove we can live and work in space for a longer period. alicia: this is also cool. thank you.