OSHA began an inspection of an Outback Steel Services worksite in Colorado Springs, Colorado on June 21, 2017. (Tr. 257). OSHA was responding to a report that two plumbers were injured the day before, when steel joists fell from overhead during the construction of a new Kum & Go convenience store. (Tr. 257). As a result of his investigation, Compliance Safety and Health Officer (“CSHO”) Shane Lane concluded that Respondent violated 29 C.F.R. § 1926.757(a)(6) [failure to secure steel joists landed on a structure] and 29 C.F.R. § 1926.761(a) [employee training not provided by a qualified person].