That was the first thing I thought when I saw these choppers cross over. They were huge and made a great sound/noise. Quiete heavy.
I am not sure for which reason the flew by, I guess a practice or surveillance action but it was a great view.
Have a great day
@s3rg3 and 
@exyle, who are witness with their developer group 
@blockbrothers for the Steem blockchain. If you want to support them, they would appreciate your vote here.They are the creators of Steemify, THE notification app for your Steemit account for IOS.