maybe not, but mikhail prokhorov is always looking for a challenge. you like danger?i like to control risk. >> kroft: "control risk." >> yeah. >> kroft: by now, you have probably guessed that russia's wealthiest citizen and largest individual taxpayer is an adrenaline junkie. he is also one of the country's most avid sportsmen, a former owner of a moscow basketball team that won the european championship. you will also notice that he is quite tall-- 6'8", to be exact-- as he trains here with his personal kick-boxing partner, who is also the coach of the russian national team. >> prokhorov: i am addicted to sport. without sport, i feel bad. in this case, it's... it's some kind of drug. >> kroft: how much time do you spend working out every day? >> prokhorov: two hours. whatever happen, two hours, i have my workout. >> kroft: reduces stress? >> prokhorov: i like to be in stress. >> kroft: you like it? >> prokhorov: it's my competitive advantage. >> kroft: for someone who loves sports, stress and challenges, there is probably no better buy than the new jersey nets. for a