According to a report published by NASA's chief inspector, Paul Martin, that the United States spent about $ 3.9 billion, the price of 70 seats to travel in the vehicles "Soyuz" Russian
The report pointed out that during the past 20 years ago launched to the International Space Station 85 vehicles "Soyuz" Russian, and the vehicle "Shatel" American and visited the station 239 astronauts.
After the US Space Shuttle program collapsed in 2011, NASA found itself unable to move its astronauts to the ISS and relied on Russia.
In 2014, SpaceX and Boeing began designing US manned vehicles under an agreement with NASA.
US Vice President Michael Pines said earlier that US manned vehicles will begin in the first half of 2020 to move US astronauts to the International Space Station.
But NASA does not rule out buying additional seats for its astronauts in 2020.
It is noteworthy that the first agreement with Russia started from $ 20 million and ended with $ 82 million for one seat in the "Soyuz" manned.