Two Marine Hornets flying off of the USS CARL VINSON apparently collided over Iraq. The search for the aircrews is underway.
I believe that all Marine F/A-18s are single-seaters, though I might be wrong about that. UPDATE: Yes, I was wrong about that. The Marines definitely fly the F/A-18D, which is a two-seater. I don’t know if these planes were Ds or not.