The flight attendant looked out the window in horror, completely stunned. [music] The aircraft's wing had a gaping hole torn through it by debris, and the inboard engine on the left wing was almost completely destroyed. A flood of failure messages [music] washed over the cockpit. Many flight control lines ran through the wings, and the explosion's [music] debris had likely shredded these systems to pieces. The first officer was frantically processing [music] the information, barely having a moment to breathe. Although the crew knew the extent of the damage, the real challenge had just begun. The hydraulics, [music] electrical systems, and flight controls could all continue to fail during the landing. They had to circle [music] the area first to devise the safest possible landing plan. The Czech captain, David, used the flight computer to calculate the landing distance, and the result was chilling. With the plane operating [music] on three engines and fully loaded with fuel, the current runway might not be long enough. [music] If they overran the runway, the consequences would be unimaginable. The plane had taken off [music] with 105 tons of fuel, and the captain wanted to dump some to reduce weight, but the system was damaged, and the fuel dumping function was inoperative. [music] This meant they had to land with a large amount of flammable fuel, and they only had one chance. Too slow, and they would stall and crash. Too fast, [music] and they would overshoot the runway. Every slight change in speed could determine the fate of everyone on board. To check if the plane could still handle [music] the landing, the captain began to test its control capabilities, gently banking the aircraft to the left to simulate aligning with the runway. [music] Although they had lost most of their roll control, the plane was still barely responsive.