743 MPH!!!!!

During a recent flight from San Diego (SAN), to Newark (EWR), we were able to take advantage of the jetstream which gave us an incredible "tailwind".  Our groundspeed (the actual speed over the ground) was 645 KNOTS which equates to 742.78 miles per hour!  I  made an announcement to the passengers that this was probably the fastest many will go in their lives....................as it was the SECOND fastest I've ever flown in 35 years of flying.  Pretty cool!!!!!  BTW, looks like I can finally post photos again.  Sweet!