 Complete the following phrase:  This period was perhaps Jacksons most successful  he had a streak of 44 races undefeated between 1993 and 1995. In addition to European and Commonwealth golds outdoors in 1994, he set another world record, running 7.30 seconds in the 60 m hurdles. A double gold at the 1994 European Athletics Indoor Championships in the 60 m hurdles and sprint events saw him set a European record of 6.49 seconds over 60 metres. Injury affected his 19951996 seasons and he finished only fourth at the 1996 Olympics. He returned to the global podium in 1997 but took silver twice  behind Anier García at the Indoor World Championships and Allen Johnson in the 