Why Josh Kerr faces one of athletics' toughest challenges

Josh Kerr targeted Hicham El Guerrouj's world mile record of 3:43.13 at the London Diamond League on Saturday, a mark that has stood since 1999 and is considered one of the toughest in athletics. El Guerrouj also holds the world 1500m record of 3:26.00, set in Rome in 1998, which has similarly endured for nearly three decades. The challenge is compared to Keely Hodgkinson's pursuit of Jarmila Kratochvilova's world 800m record, both considered extremely difficult targets.