On Tuesday, July 19th, a crane, with its boom extended 25 stories high, buckled and collapsed onto the active Tappan Zee Bridge in New York.  Thankfully and amazingly, no one was killed and only a couple people sustained minor injuries, but traffic on the bridge was stopped for hours.  All but one lane was re-opened on the bridge within 8 hours of the collapse.  After the collapse, work began to try to determine the cause of the accident.