The FMI Energy & Store Development Conference in St. Louis gave retailers the opportunity to discuss their experiences with installed CO₂ systems. Harrison Horning from Delhaize America / Hannaford, Jamie J. Meyers from Walgreens, and Rob Olden from GI Energy, discussed pilot transcritical CO₂ stores in Maine and Illinois, whilst Benny Smith from Price Chopper talked about the first CO₂ system in North America, installed in 2008.