an update to a big story from last summer New York police announcing today the cause of the explosion that killed a couple at the Rainbow Bridge in 20123 is still unknown the Bentley Flying Spur seen here speeding by at the top of your screen had its data recorder destroyed in the fiery crash the incident shut down the border and had officials fearing it was a terrorist attack both police in New York and the mayor of Niagara Falls New York say the probe is now considered closed but they didn't rule without reopening the investigation if new evidence turns up