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That day is seared into the memory of every human being on the planet: the day the world changed. First came the attack on the Philippines. Within days they spread, as though appearing out of nowhere, striking out at more islands, forging a foothold in the South Pacific. Then came the first attack on U.S. soil - Los Angeles - and the reality became clear: our world was at war o...。大学教师孙立军坚持公益行动多年，一次偶然机会，孙老师听到了贫困地区学校女教师如厕难的问题，深受触动，于是发起了一项在150小时之内徒步横穿800公里青海“生命禁区”的公益活动。他召集了七位跑者朋友及一条志愿服务的大黄狗，并立下挑战规则：只要有一人在规定时间内跑完全程，就可为新厕所的建设筹得善款。然而，参加挑战的这些业余跑者们仍然带着为何公益一定要来到这样危险的区域吃苦耐劳的疑问，甚至不太明白孙老师试图把公益募捐上升到必须亲身完成挑战的意义。