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NASA dicit:

Dragon 2 is a class of reusable spacecraft developed and manufactured by U.S. aerospace manufacturer SpaceX, intended as the successor to the Dragon cargo spacecraft. The spacecraft launches atop a Falcon 9 Block 5 rocket and returns via ocean splashdown. When compared to Dragon, Crew Dragon has larger windows, new flight computers and avionics, redesigned solar arrays, and a modified outer mold line.

The spacecraft has two planned variants – Crew Dragon, a human-rated capsule capable of carrying up to seven astronauts, and Cargo Dragon, an updated replacement for the original Dragon. Crew Dragon is equipped with an integrated launch escape system in a set of four side-mounted thruster pods with two SuperDraco engines each. Crew Dragon has been contracted to supply the International Space Station (ISS) with crew under the Commercial Crew Program, with the initial award occurring in October 2014 alongside Boeing CST-100 Starliner. Crew Dragon’s first non-piloted test flight to the ISS launched in March 2019.

SpaceX conducted an in-flight abort test from Kennedy Space Center Launch Complex 39A in Florida on 19 January 2020 at 15:30 UTC. The Crew Dragon test capsule was launched in an atmospheric flight to conduct a separation and abort scenario in the troposphere at transonic velocities, at max Q, where the vehicle experiences maximum aerodynamic pressure. The test objective was to demonstrate the ability to safely move away from the ascending rocket under the most challenging atmospheric conditions of the flight trajectory, imposing the worst structural stress of a real flight on the rocket and spacecraft. The abort test was performed using a regular Falcon 9 Block 5 rocket.

Video credit: NASA/SpaceX