It was nearly 10 years ago that a bright September day was darkened by the worst attack on the American people in our history. The images of 9/11 are seared into our national memory -- hijacked planes cutting through a cloudless September sky; the Twin Towers collapsing to the ground; black smoke billowing up from the Pentagon; the wreckage of Flight 93 in Shanksville, Pennsylvania, where the actions of heroic citizens saved even more heartbreak and destruction.
那个阳光明媚的九月被美国有史以来遭受的最惨重的恐怖袭击遮蔽，距今就要十年了。911事件的情景一直留在全国人民的记忆中——被劫持的飞机划过万里无云的九月晴空；双子塔轰然倒塌；五角大楼冒出浓浓黑烟；93航班上英勇的乘客们为了挽救更多无辜生命采取行动让飞机坠毁在宾夕法尼亚。
