Dragon 2 is a class of reusable spacecraft developed and manufactured by American aerospace manufacturer SpaceX, conceived as the successor to the Dragon cargo spacecraft. The spacecraft are designed for launches atop a Falcon 9 Block 5 rocket and a splashdown return. In comparison to its predecessor, it has larger windows, new flight computers and avionics, redesigned solar arrays, and a modified outer mold line. The spacecraft is used in two variants – Crew Dragon, a human-rated capsule capable of carrying up to seven astronauts, and Cargo Dragon, an updated replacement for the original Dragon. Cargo Dragon capsules are repurposed flown Crew Dragon capsules. Crew Dragon is uniquely equipped with a set of four side-mounted thruster pods with two SuperDraco engines each, which serve as a launch escape system. Both variants have been contracted for use with logistical operations of the International Space Station (ISS) under Commercial Resupply Services 2 (CRS2) and the Commercial Crew Program.