The picture that emerged was that Islamabad was basically located on the opposite side of the world from Denver, and so a great circle route plotted directly over the North Pole would take the jet to the Mile High City, if it had that much range, which it didn’t. In fact, if they were to fly the jet on that heading, it would be lucky to reach as far south as Regina, Saskatchewan. More likely, they’d have to set down in Saskatoon for refueling.