Passage: Hepburn toured Central America in February 1989, and met with leaders in Honduras, El Salvador, and Guatemala. In April, she visited Sudan with Wolders as part of a mission called "Operation Lifeline". Because of civil war, food from aid agencies had been cut off. The mission was to ferry food to southern Sudan. Hepburn said, "I saw but one glaring truth: These are not natural disasters but man-made tragedies for which there is only one man-made solution – peace." In October 1989, Hepburn and Wolders went to Bangladesh. John Isaac, a UN photographer, said, "Often the kids would have flies all over them, but she would just go hug them. I had never seen that. Other people had a certain amount of hesitation, but she would just grab them. Children would just come up to hold her hand, touch her – she was like the Pied Piper."

Question: What was the cause of a halt in food being sent from agencies?
civil war