SpaceX in transit past ISS - NASA Video

The SpaceX Dragon capsule closes in on the International Space Station for a series of tests to clear it for its final rendezvous and grapple.

Early this morning, Dragon's thrusters fired, bringing the vehicle 2.4 kilometers below the International Space Station. The vehicle completed two key tests at that distance.

Dragon demonstrated its Relative GPS and established a communications link with the International Space Station using CUCU. Astronauts commanded on Dragon's strobe light to confirm the link worked.