Rocketplane XP reusable spacecraft

The push for reusable spacecraft, made famous by SpaceShipOne and the X-prize, is gaining momentum to become a reality before the end of this decade.

One such plan calls for, "Rocketplane XP to depart from the Oklahoma Spaceport located in Burns Flat and whisk customers skyward to over 60 miles (100 kilometers) above Earth. At that height, a spectacular view is promised, along with "over the top" weightlessness for up to four minutes. The company also envisions transporting innovative scientific experiments and valuable payloads to sub-orbital space and beyond," according to Space.com.