The SpaceX Dragon craft is poised and ready to be released from the International Space Station on May 21, 2015. NASA astronaut Terry Virt Expedition 43 Commander tweeted this comment along with this image: "Releasing SpaceX Dragon today with the help of @Station CDRKelly". This was SpaceX's sixth resupply mission to the space station and returned about 3,100 pounds of experiment samples and equipment back down to Earth.