by Jessica Martini, Christina Bossinakis, and Jill Williams LEXINGTON, KY - The Keeneland September Yearling Sale, which opened with a record-setting session Monday, continued with an action-packed second Book 1 session Tuesday, establishing yet another September session record average and median. Twenty horses sold for $1 million or more during the session, led by a colt by Gun Runner and a filly by Flightline who brought matching $2.2 million price tags. "It was a good day at the sale, for sure," said Keeneland President Shannon Arvin. "We built on what...