Threading Weather
IIRC from my USAF days, USAF aircraft were required to stay 20nm away from thunderstorm cells - and maybe farther on the downwind side (it's thirty+ years ago so I may be misremembering the details). I also seem to recall that at the time, the airlines were using five miles as an adequate safety margin.
Does anyone know if this is still the case? If so, is it possible that the airlines are a little too brave for their own - not to mention their passengers' - good?