Policemen stand guard as the Soyuz TMA-18M spacecraft is ready to be transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. The Soyuz is scheduled to blast off with Aidyn Aimbetov of Kazakhstan, Sergei Volkov of Russia and Andreas Mogensen of Denmark to the International Space Station (ISS) on September 2, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

A policeman stands guard as the Soyuz TMA-18M spacecraft is ready to be transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported to a launch pad at the Russian-leased Baikonur cosmodrome in Kazakhstan early on August 31, 2015. Russia's Soyuz TMA-18M spacecraft carrying the International Space Station (ISS) crew of Kazakhstan's cosmonaut Aydyn Aimbetov, Russian cosmonaut Sergei Volkov and Denmark's astronaut Andreas Mogensen, is scheduled to blast off to the ISS on September 2, 2015. (Photo by Kirill Kudryavtsev/AFP Photo)

The Soyuz TMA-18M spacecraft is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

A police helicopter flies above the Soyuz TMA-18M spacecraft as it is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported from an assembling hangar to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is transported to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

A policeman stands guard as the Soyuz TMA-18M spacecraft is transported to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

A police helicopter flies past as the Soyuz TMA-18M spacecraft is transported to its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

In this aerial photo, the Russian Soyuz TMA-18M space ship that will carry new crew to the International Space Station is fixed vertical at the launch pad in Russian leased Baikonur cosmodrome, Kazakhstan, Monday, August 31, 2015. The Russian rocket will carry Kazakhstan's cosmonaut Aydyn Aimbetov, Russian cosmonaut Sergei Volkov and Denmark's astronaut Andreas Mogensen on Wednesday, September 2. (Photo by Dmitry Lovetsky/AP Photo)

The Soyuz TMA-18M spacecraft is set on its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is lifted on its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18M spacecraft is set on its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

Visitor looks at the Soyuz TMA-18Mis installed at the launch pad at the Baikonur Cosmodrome, Kazakhstan, August 31, 2015. (Photo by Sergei Ilnitsky/EPA)

The Soyuz TMA-18M spacecraft is set on its launch pad at the Baikonur cosmodrome, Kazakhstan, August 31, 2015. (Photo by Shamil Zhumatov/Reuters)

The Soyuz TMA-18Mis being installed at the launch pad at the Baikonur Cosmodrome, Kazakhstan, 31 August 2015. Members of the main crew of the 45/46 expedition to the International Space Station (ISS) Kazakhstan's cosmonaut Aydyn Aimbetov, Russian cosmonaut Sergei Volkov and Denmark's astronaut Andreas Mogensen from the European Space Agency are scheduled brought to the ISS on September 2, 2015. (Photo by Sergei Ilnitsky/EPA)