My guess is these are photos for security passes - you know 'don't smile' and 'look directly at the camers' - who has a good driver's license or health card or passport photo. Still very entertaining to see some of these athletes so stripped down compared to how they usually look but for the life of me I don't understand why they use these photos for the Olympics site - did same thing for Vancouver - couldn't they find nice publicity shots for the website - better advertising.