In 2008 at Beijing Olympics Armstrong finished fourth in shot put with a toss of 21.04m and missed the podium by 1cm behind Andrei Mikhnevich of Belarus, who took bronze.
But in 2014 August, Mikhnevich received a lifetime ban as his samples from 2005 World Championships in Finland tested positive for doping. Mikhnevich was stripped of the record books and all the medals starting from 2005.
The Canadian shot putter received his bronze medal in front of some 700 fans at the Kamloops' Tournament Capital Centre where he trains most of the time.
"It's probably a bit more nervous when you're in front of your home crowd and a lot of family members that I wouldn't have had in Beijing," Armstrong said.
"Thank you to the IOC, the COC and the IAAF for getting this medal back to Canada where it really belongs," Armstrong said.
"It's very overwhelming with the people that came out and supported me today," he added.
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