One World Trade Center to top out today! Watch live now (video)

The final two sections of 1WTC's 408-foot-high spire are due to be raised today. Watch live and see a time lapse of construction between 2004 and 2012.

One World Trade Center will take a step closer to being ready for opening in 2015, when the final two pieces of the 408-foot-tall spire are hoisted into place today, completing the top of the 1,776-foot-tall skyscraper.

Watch live right now at, or—if you've missed the "action" (admittedly, things are moving at a slow, steady and safe pace)—catch a time-lapse video of the construction between 2004 and 2012 below.