summer olympics competed summer olympics london july august marked nation tenth appearance summer olympics debut summer olympics sierra delegation included track field athletes long selected flag opening closing ceremonies respectively athletes progressed round background participated summer olympic games debut summer olympics mexico_city mexico summer olympics london exception summer olympics munich summer olympics montreal boycott relating new_zealand national rugby union team touring south_africa highest number athletes participating summer games fourteen summer olympics moscow russia summer olympics atlanta usa athlete won medal olympics athletes qualified london games track field long jump qualified meeting qualifying standards events respectively flag opening closing ceremonies respectively athletics summer games marked olympic debut qualified metres posting time seconds commonwealth games men metres seconds faster qualifying standard competed august heat finishing athletes despite achieving personal best time seconds ranked chile reyes seconds heat led france overall finished 51st athletes seconds slower slowest athlete progressed final round end competition competing olympics notable carrying flag opening ceremony qualified olympics meeting qualifying standard long jump competed august group finished joint 11th athletes philippines posting jump metres ranked ahead ukraine metres group led great_britain metres finished 23rd athletes overall metres qualification spot advancing final key note ranks given track events athlete heat qualified round qualified round fastest loser field events position achieving qualifying target national record round applicable event bye athlete required compete round
Sierra Leone at the 2012 Summer Olympics