Athing Mu, representing Trenton Track Club, placed second in the women's invitational 400 meters in 53.14 seconds, trailing only reigning NCAA Division 1 outdoor champion and first-year American professional Wadeline Jonathas (51.71) at the Dr. Sander Invitational Columbia Challenge at The Armory in New York. Mu, a Texas A&M commit, produced the fastest prep 400 time in the country this season.