In article ,
says...

Rick Jones wrote:
David Spain wrote:
Got some rusty water coming out of fire suppression nozzle at pad
right at 00:52 T-02 but runs clean by 0:54... Or rust inhibitor?

Any word on the attempt to simulate landing the first stage?

The BBC did seem to have something to report on that matter:

http://www.bbc.co.uk/news/science-environment-24326413

This article isn't very good and appears to get some of the (important)
details wrong.

From what I've read elsewhere, the supersonic retro burn (made with
three engines), which is designed to reduce/eliminate the horizontal
component of the stage's velocity went well. Those three engines did
*not* continue to fire as there simply is not enough fuel to "burn" all
the way down.

Later in the trajectory a single engine was started for the final
descent. Unfortunately, as this burn was taking place, the stage went
into a roll which exceeded what the control system could handle. This
caused the fuel to spin to the outside of the tanks which made the
engine shut-down due to lack of fuel at the (central) inlet in the tank.

This caused the stage to hit the water hard. SpaceX reportedly
recovered at least some first stage debris for analysis.

Jeff
--
"the perennial claim that hypersonic airbreathing propulsion would
magically make space launch cheaper is nonsense -- LOX is much cheaper
than advanced airbreathing engines, and so are the tanks to put it in
and the extra thrust to carry it." - Henry Spencer