The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is transfered to the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)





The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is transfered to the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)





The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is transfered to the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)





The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is lifted on the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)





The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is transfered to the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)





The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is set on the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)