After the first stage booster separated from the upper stage, it came back down for a powered landing onto SpaceX’s Landing Zone 1 at Cape Canaveral.
Here is a video of the landing as seen during the SpaceX webcast:
After liftoff the rocket disappeared quickly into a cloudy sky:
The launch was the first for SpaceX from Pad 39A, which is the same pad used by most of the Apollo Saturn V launches to the Moon and for most of the Space Shuttle launches. Here is a brief history of the pad:
Update: This Dragon mission has a particular emphasis on science and technology cargo.
- SpaceX Launches NASA Science, Cargo to the Space Station | NASA
- NASA Cargo Headed to Space Station Includes Important Experiments, Equipment | SpaceX/NASA
Here is a video of a briefing held last Friday on the science payloads: