America’s mighty B-52 Stratofortress has been in service for well over 70 years already, and with a wide array of upgrades ongoing, it’s likely the BUFF, as it’s known to many in uniform, will serve all the way up to, and maybe even beyond, the century mark. So, let’s talk about what makes the B-52 arguably the best bomber design in history, why we might wish that it could fly forever, and why we need to start planning — like, right now — to replace it.

Source: How the B – 52 Became Almost Impossible to Replace