Boris Onishchenko Boris Onishchenko Boris Grigoryevich Onishchenko (Борис Григорьевич Онищенко; also transliterated as Onyshchenko, Onishenko, Onischenko; born 19 September 1937) is a former Soviet modern pentathlete who competed at the 1968, 1972 and 1976 Summer Olympics. He was a multiple Olympic and world champion, but was disqualified for cheating at the 1976 Summer Olympics and banned for life from sports. Having already earned his country an Olympic medal earlier in Mexico City and Munich, Onishchenko entered the event as a three-time world champion. After the first event of the pentathlon, the Soviet team found itself in fourth place, trailing closely behind Britain.
Guatemala at the 2015 Pan American Games of 4 athletes (2 men and 2 women). Guatemala's fourth athlete (Astrid Camposeco) tested positive for doping on May 23 (but results were determined only on July 9 when she was in Toronto and was disqualified before the games started. She was scheduled to compete in the women's +75 kg category. Guatemala qualified one male athlete. Guatemala at the 2015 Pan American Games Guatemala competed in the 2015 Pan American Games in Toronto, Ontario, Canada from July 10 to 26, 2015. Race walker Mirna Ortiz was the flagbearer of the country at the opening ceremony. The following table lists Guatemala's