And another successful launch and recovery – this time from Vandenburg CA (polar orbit). Back to back launch and landings.

New titanium grid fins (as opposed to the original aluminum grid fins) for better heat tolerance.

https://en.m.wikipedia.org/wiki/Autonomous_spaceport_drone_ship (ASDS)

http://www.teslarati.com/spacex-set-second-weekend-launch-new-titanium-grid-fins-tested/

http://www.spacex.com/news/2017/06/24/iridium-2-press-kit