Compared with the United States, which won three gold medals in a rush on Thursday, it was not a big night for Britain. But it was a breakthrough just the same as David (Dai) Greene, hair cropped no-nonsense short, set his jaw and surged into the lead for good on the final straightaway of the men’s 400-meter hurdles to give his country its first victory in these world track and field championships. - www.nytimes.com