"Tailpipe-One, this is Hammerhead. BDA on Objective Khepri substantial. Target eliminated, over."
"Copy that, Hammerhead. We're RTB. Thanks for being our eyes on the ground. Out......"
The full description and image can be found here.
You can find more work by Rookie425 over on their Twitter and Deviantart.
You can also find Rookie425's Halo Spotlight Fanart Feature here.