Aly Raisman performing on the balance beam. (Photo by Rebecca Blackwell/AP)
Here’s how dominant Katie Ledecky was in breaking her own world record bos.gl/GiTpM8R http://pbs.twimg.com/tweet_video_thumb/CpTgoUBVMAE7A-3.jpg
Aly Raisman (right) was second to Simone Biles (left) in the qualifying round. (Photo by Mike Blake/Reuters)
Aly Raisman performs her floor exercise routine.
Alexandra Raisman, a Needham native, competed on the floor during the women's qualifications. (Photo by Damir Sagolj/Reuters)