Raja from Manassas asks, is there a theoretical maximum life for an orbiter or can it just be serviced and used over and over?
Are there any plans to build a new orbiter to replace Columbia?
Actually, the orbiters were designed to fly 100 times. So we still have a lot of life left in our orbiters.
And we're not planning on building a new replacement orbiter.
All our focuses in that regard are going to be to develop a new space vehicle that will allow us to go to the Moon and Mars and beyond.