CITGO Lemont Refinery celebrated National STEM Day on Nov. 8 with more than 360 students, teachers and parents from Homer Glenn, Lemont, Lockport and Romeoville participating in 29 hands-on STEM activities and live demonstrations. The event is part of the CITGO STEM Talent Pipeline, a program that seeks to increase access to educational opportunities in science, technology, engineering and math (STEM).