Eli Stephens: the Killing of Nicola Calipari, a Math Lesson: "Sgrena has told CBS that the car she was in was going 30 mph. At 30 mph, a car is going 15 yards per second. So, according to the U.S. military, they fired warning shots within 2.7 seconds of flashing a warning light, and used 'deadly force' 2.3 seconds after that. And actually, if the U.S. military story were true and the car were really travelling at 'high speed', let's be generous and call that only 45 mph, that's 22 yards per second, meaning 1.8 seconds between warning lights and warning shots, and 1.6 seconds between warning shots and deadly shots."