銘記911

這是個簡單的介紹，距911已過了15年，這些年中我們發掘了什麼故事？隱藏的代價又是什麼？

This will be a landmark special with a simple premise: It's been 15 years since 9/11. What are the stories that have been uncovered over the last 15 years? What were the hidden costs?