NASA is not being "disbanded". Hardly. Where did you get that idea? That letter seems to be more concerned with cancellation of contracts than with
the space program.
The White House budget would cancel the Constellation program. The reason given is that the project is way over budget and way behind schedule. There
are many who believe that it was ill-concieved from the beginning.
The White House said it makes more sense to, rather than work on another Moon landing program, work on long range goals.
The President’s Budget cancels Constellation and replaces it with a bold new approach that invests in the building blocks of a more capable
approach to space exploration that includes:
* Research and development to support future heavy-lift rocket systems that will increase the capability of future exploration architectures with
significantly lower operations costs than current systems – potentially taking us farther and faster into space.
* A vigorous new technology development and test program that aims to increase the capabilities and reduce the cost of future exploration
activities. NASA, working with industry, will build, fly, and test in orbit key technologies such as automated, autonomous rendezvous and docking,
closed-loop life support systems, in-orbit propellant transfer, and advanced in-space propulsion so that our future human and robotic exploration
missions are both highly capable and affordable.
* A steady stream of precursor robotic exploration missions to scout locations and demonstrate technologies to increase the safety and capability
of future human missions and provide scientific dividends.