https://www.ainonline.com/aviation-news/business-aviation/2008-07-29/works-cessna-citation-columbus
In the Works: Cessna Citation Columbus | Aviation International News
As the detail design phase for the large-cabin Columbus picks up speed, Cessna has expanded the program team to 500 people, up from 150.
in the workscessna citation columbusaviationinternationalnews