A big advantage of SpaceX’s Dragon over the Soyuz is that the spacecraft is significantly lighter.
The less a rocket weighs at launch, the more money space agencies can save.
Dr Brona said the Dragon also allows for a more comfortable ride, giving astronauts more space inside of the spacecraft, unlike the cramped Soyuz capsule.
But while NASA has pursued SpaceX and Boeing under the Commercial Crew contract, the space agency has also been busy developing its own Orion spacecraft to take astronauts to the Moon and back.
According to Dr Brona, all of the recent developments have left Russia on thin ice.