Looking at the recent post by National Geographic made me think. How would anyone be able to keep up with technology if no one mentions a thing about it? Take the SR-71 for example. It was manufactured in the 1960s. It can travel at Mach 3+ speeds (3x the speed of sound). It has Stealth like body design. It makes you think, if we had this technology in the 60s what do we have now 50 years later. Do we have Mach 11 aircraft, do we have aircrafts that are invisible to the naked eye and not just to radar, or do we have robotic pilots instead of human. It makes you think is there anything else that is being kept as a secret, and if yes when will we find out about.