This week, Ana Valles witnessed the moment she has been waiting for the last year and a half: Chihuahua, Mexico is Aurora's fourth sister city. Valles is originally from Chihuahua, and moved to Aurora 11 years ago. “I definitely saw the potential of this partnership and collaboration, so I know this will be very beneficial for both cities,” she said. She brought a proposal to Aurora City Council to make Chihuahua and Aurora sister cities. On Saturday, Aurora Mayor Mike Coffman returned home from a trip to Mexico to finalize the deal. Coffman, Valles, and several others spent five days in Chihuahua making it official. ----- More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.