Hungary's Dorina Boczogo performs on the balancing beam (AP)
Matias Hypolito of Brazil attends a gymnastics training session at the O2 Arena (Reuters)
Dorina Boczogo of Hungary trains with her coach as she attends a gymnastics training session (Reuter
Swimmers practice in the pool at the Aquatics Center at the Olympic Park (AP)
Brazil's Ethiene Christina Gonser Franco, right, prepares to perform as teammate Daiane dos Santos c
A Cuban athlete paddles in Eton Dorney, near Windsor (AP)
In this multiple exposure photo, Brazil's Daniele Matias Hypolito performs on the vault (AP)
North Korea's women soccer team (Reuters)
Federica Pellegrini of Italy practices at the Aquatics Center at the Olympic Park (AP)
Daniele Matias Hypolito of Brazil attends a gymnastics (Reuters)
Great Britain's women's eight trains on Dorney Lake in Eton Dorney, near Windsor (AP)
Daiane dos Santos of Brazil practices (Reuters)
Kazakhstan boxers Marina Volnova (R) and Gani Zhailauov pose (Reuters)
Daiane dos Santos of Brazil practices (Reuters)
A rower from Sweden practices on a single sculls boat (AP)