An Amber Alert has been cancelled for two children who may be in danger and may be traveling through South Dakota.  7-year old Luna Potts and 8-year old Hunter Potts are believed to be traveling with 50-year old Benjamin Martin Moore and their non-custodial mother, Leah Potts.  The vehicle may be a dark blue Chevy Equinox with Alberta license plate CGC 2492.  There is an order to return the children to Canadian authorities.  The Amber Alert originated in Canada.  Various reports say that Moore is a registered sex offender whose crimes include sex offenses against children and child pornography.  If you spot the vehicle and/or persons included in the Amber Alert, do not approach them.  Contact your local authorities immediately.