WTC 7

(Newser) - Two decades after its destruction in the Sept. 11 attacks, the work to rebuild the World Trade Center complex remains incomplete. Two planned skyscrapers, a performing arts center, and a church are still unfinished at the site, which plays host Saturday to the annual ceremony honoring nearly 3,000 people...

(Newser) - Though you've no doubt read plenty of stories related to the 10th anniversary of the 9/11 attacks, here's one that's likely to surprise. Yahoo UK lists nine facts you probably didn’t know about the tragic day:

• Twenty survivors were pulled out of the rubble: One was

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(Newser) - Fires, not explosives, caused the collapse of World Trade Center 7—a skyscraper near the twin towers—on Sept. 11, a 3-year US government investigation concludes. Scientists with the National Institute of Standards and Technology say the 47-story tower was destroyed by fires, made worse by a failed sprinkler system...