The FloTrack crew in Des Moines breaks down the second day of action from the U.S. Championships, including: -Noah Lyles' world-leading 9.88 in the 100m -The heavy collegiate presence in the women's 100m, led by Aleia Hobbs -What is Michael Norman capable of this weekend in the 200m? -Can anyone unseat Ajee Wilson in the women's 800m? -Who will take the showdown in the women's 1500m between Jenny Simpson and Shelby Houlihan?