Hardlines mate but its necessary for someone.
Aye its hardline's 99 if your on a break or resting etc and the jets are overhead; my limited experience of it when we were rocket attacked at Basra COB at night was that paired American FJs could generally be totally relied upon to be overhead within about 5-6 minutes of first hit, and to be at a medium altitude or higher and go into an immediate racetrack pattern, presumably to set up an target acquisition, or just to reassure us, or me. And remain overhead for some time as I recall.
F16, F15 and occasionally F18. Nice to have, indeed all we had nation wise-no RAF or FAA ever showed in this way, I used to read the after reports. So my guess this sort of US training keeps ongoing and isn't half valuable.
So God bless those Americans whoever you/they were ey?