The future of America's space program is at a critical point in time; decisions are being made that will affect our ability to successfully maintain our leadership in human space flight, our national security and our capability to successfully compete with the international community in the commercial use of space.

What does the future hold for U.S. human spaceflight (HSF)? The United States had been the undisputed leader in space exploration for several decades, until recently.

With the completion of its last flight in July of 2011, the Space Shuttle has been arbitrarily retired. And today, Russia is the only partner in the International Space Station (ISS) program that is able to transport astronauts and cosmonauts to and from Low Earth Orbit (LEO).

BIG PIC: Historic Pairing: Shuttle Docked to the ISS

The Space Shuttle amassed an impressive record of achievement during its lifetime, culminating in the very successful assembly of the International Space Station (ISS). It was a very versatile spacecraft that allowed the crews to perform Extra-Vehicular Activities (EVAs), assemble structures in space, repair satellites, and perform spacecraft retrieval missions.

In addition, the Shuttle was also a superb research platform, especially when equipped with a Spacelab or Spacehab module. It could carry a cargo of 60,000 pounds (27,000 kilograms) to orbit or return a cargo of equal weight to Earth.

In its place the U.S. is developing Orion, referred to as a Multipurpose Crew Vehicle (MPCV). Orion returns the nation to flying capsules that return to Earth via parachutes using technology from the 1960s. It has no capability to carry cargo, support EVAs, do structural assembly in space, accomplish satellite repair or retrieval missions. It returns to Earth by parachute, landing in the water, as Orion is too heavy to be recovered on land.

The MPCV is supposedly being developed for exploration missions beyond Earth orbit but it provides no protection from space radiation for the crew. The first planned human flight is currently scheduled for 2021. That date is dependent upon the availability of a new Space Launch System (SLS) rocket that is yet to be developed.

Currently, only funds for research, development, and risk mitigation have been awarded for SLS which, raises the question of whether or not the launch system will ever be developed at all.

PHOTOS: Inside Atlantis' Final Space Station Mission

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Time for the U.S. to Partner with China in Space?