Re: Another interesting article
Slower over the average of the entire flight yes, but aircraft like the F-22 and F-35 can maintain Mach 1+ for extended periods of time (super-cruise). The earlier jets like the Century series could only manage short bursts of Mach 2 and a bit before their engine blew, they ran out of fuel or the airframe overheated (or all three) and flew subsonic most of the mission.