Mariano Rivera remembers being home that day on what started outas a beautiful morning. His mother-in-law was watching the news andhe heard her screaming: The first plane had hit the World TradeCenter. Then he saw the second one do the same.Jorge Posada was at the hospital with his ailing son when heheard the commotion in the hallway and thought ”the worst wascoming.”Derek Jeter recalled meeting all those families and firefighterswho lost loved ones.”It was hard,” Rivera said, ”for everybody.”Three longtime stars with the New York Yankees reflected on 9/11as the team marked the 10-year anniversary with a ceremonyWednesday before a game against the Baltimore Orioles.Former Defense Secretary Donald Rumsfeld took part in theon-field tribute to soldiers, rescue workers and victims of theSept. 11, 2001, attacks. The salute was held four days early atYankee Stadium because the team will be in the middle of a longroad trip Sunday.”What I remember of those days is that the whole country gottogether. That’s a beautiful thing,” Rivera said at a pregame newsconference. ”I wish it was still like that, but it’s not. Thewhole country, the whole U.S. got together and it was amazing.Everybody helping everyone, it didn’t matter what race or color youwere. We…