World Trade Center

The newly reconstructed WTC Cortlandt station opened on Saturday, just three days before the anniversary of the attack.

It's been 12 years since the attacks. Just after 8:45 a.m. ET there was a moment of silence marking the time when the first plane struck the World Trade Center. There are also events at the Pentagon and in southwestern Pennsylvania, where the other jets came down.

With its glittering spire now firmly attached, the new World Trade Center became the tallest building in the Western Hemisphere Friday morning.