Italy is now home to the “fastest man alive.” Lamont Marcell Jacobs earned the informal title, previously held by the now-retired Usain Bolt, Sunday after winning gold in the 100-meter final, posting a personal best time of 9.80 seconds. The 26-year-old sprinter edged American Fred Kerley (9.84) and Canadian Andre De Grasse (9.89) in what...