15-year-old Katie Grimes is second to Katie Ledecky to make Olympic swim team in 800

OMAHA, Neb. — It was the Katie and Katie show Saturday night, the 24-year-old star of the U.S. swimming team and the 15-year-old upstart leading a pack giving chase in the women’s 800 freestyle. Katie Grimes, the 15-year-old who used to think it was cool just to have the same first name as Katie …