What a long day. Up before dawn after a late night touring Guanajuato City. We had to be at the airport by 6:30am. Then through customs that rummaged through our well packed bags. Next a 5 1/2 hour layover in Monterrey, MEX before flying to Dallas. Our plane from Dallas to OKC was delayed by 2 hours. We rolled into Enid about Midnight. Very weary.