Anonymous ID: 5dd4c3 Feb. 15, 2018, 5:36 a.m. No.384885 🗄️.is 🔗kun >>4919 >>5064 >>5152 The SR-71 was designed in the 1960s with slide rules. It still holds all top speed and altitude records. Its true speed and altitude are still classified. What technology are they hiding from us today?