The world in photos: June 15-21

The Tootsie Rollers (left to right) Katy Heavens, Anna Gilthorpe, Lisa Millar, Meg Gallagher, Flora Dawson and Khiley Williams show off their hats on the opening day of the 2015 Royal Ascot Meeting at Ascot Racecourse, Berkshire, UK, June 16, 2015. [Photo/IC]

We present some of the most striking images from major stories around the world in the past week. They include: Muslims marking the start of their holy month, horse-racing fans parading their hats on the opening day of Royal Ascot in the UK, and Greeks demonstrating in favor of the eurozone.