However, some pilots neglect these checklists and perform the tasks by memory, increasing the chances of forgetting to lower the landing gear. Even careful pilots are at risk, because they may be distracted and forget to perform the checklist or be interrupted in the middle of it by other duties such as collision avoidance or another emergency. In the picture shown above, the B-17 Dutchess' Daughter had landed normally, when the copilot inadvertently flipped the landing gear switch to retract.