A spokesperson for Joint Base Charleston told News19 Sunday morning that a group of 12 C-17 cargo jets took off from their base around 7 p.m. Saturday. Courtesy Charleston, SC (WLTX)

My roof mounted camera in Littleton captured the strange line of lights moving from east to west over Denver, Colorado around 9 pm tonight @CBSDenver @DenverChannel @9NEWS @KDVR https://t.co/pgr8Z5PS3r — Eric Hurst (@EricHurstPIO30) December 10, 2017

End the speculation: Our sister station in South Carolina figured out what those weird lights were last night. https://t.co/9tRfSWDgQQ #9news — Steve Staeger (@SteveStaeger) December 10, 2017

Staff Sgt. John Eller conducts pre-flights check on his C-17 Globemaster III Jan. 3 prior to taking off from Hickam Air Force Base, Hawaii for a local area training mission. Sgt. Eller is a loadmaster from the 535th Airlift Squadron. (U.S. Air Force photo/Tech. Sgt. Shane A. Cuomo)