Follow @ArianeGroup and share the adventure of building Ariane 5 and developing Ariane 6! Ready? 
pic.twitter.com/7g0wmjjGrt
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I did not when I posted it but I researched a bit and found out, nice I like it ^^
only "working on" while @SpaceX already has a working product ? You wait to be totaly useless to try to catch up ? 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.