10 Worst aircraft accidents and incidents

When it was finally ready, the KLM was told to taxi up the runway and turn 180 degrees to prepare to take off. The Pan Am was told to taxi up to the third exit, cross back to the taxiway (clear at that point of other airplanes), then turn back onto the runway after the KLM left. However, the crew of the Pan Am was confused about which exit to take, particularly since they were not marked by number and visibility was low in the fog. Also, the slant of the exits meant that the third exit would require performing two 135 degree turns, nearly impossible in that amount of space, while the fourth exit would require two comfortable 45 degree turns. The Pan Am continued taxiing to the fourth exit.