Well, shucks. Okay, here's my coastie story -- and I related a bit of it before, but here's the full deal:
I was running transcription for the scanner feeds over the weekend. I showed up just before dawn CDT, and was assigned to monitor all four active feeds, and pass up anything interesting.
Sure enough, about daybreak, the CG relays a report from PD radio that they were monitoring that two NOPD officers are "pinned down" by fire near a highrise by the SHEP exit of I-10, and requesting armed air support. The response I heard (I was monitoring the air channels) was along the lines of "I don't know if anyone can respond, but we'll try"; followed by an "any unit able to respond" call.
two minutes later, Hammer lifted from the USCG Cutter Spencer.
Thirty minutes after that, other units were tasked to the site.
Never found out whether it was a real call or not, but when it comes to response time, those guys aren't kidding.