And plan after 2015 throw in an use

Is at most 20 years according to the space shuttle life span of plan the United States, each one should fly 100 times.Up to currently, 5 space shuttles added to fly just 132 times and still had to 2 times result in space shuttle is exploding among them, moreover 2 already the seriously super term undergo military service, each kind of concealed suffer from continuously occurrence.Because the United States will accelerate "the depth probes into an activity" to the space in the future, space shuttle already didn,t use violence of ground.
After getting into 21th century, the United States re- produced interest to the cosmos airship and thought that it is more more safe than space shuttle, the cost is also much low.For example, the United States is developing new generation to carry person is airship"hunt a " to investigate aircraft now, and plan after 2015 throw in an use.American government declares after the space shuttle backs service, will encourage that each kind of private companies constructs and shoots various aerospace machines.(Gao Yi Jun)