 Why the big event, we don't know, but we do know that this is a common area where we historically have had training events for years. Ten dolphins died before the teams could assist. The Transportation Security Administration is forecasting record-setting travel for the July 4th holiday. TSA expects more than 32 million passengers between Friday, June 28th, and Monday, July 8th, which is a roughly 5.5% increase year over year.