Photo Kieran Gibbs of Arsenal, left, and Ahmed Elmohamady of Hull during the teams’ 0-0 draw in the FA Cup fifth round. The game will have to be replayed. Credit Hannah Mckay/Reuters Arsenal’s bid for a third straight FA Cup title was checked by a frustrating 0-0 draw against Hull in the fifth round on…

Photo The United States’ Trayvon Bromell and Canada’s Andre De Grasse celebrated after tying for third in the 100 meters at the 2015 world championships in Beijing. Credit Lee Jin-man/Associated Press BOSTON — It is another Olympic year, and Usain Bolt still rules the 100 meters, if only by a hundredth of a second. But…