Nike supported Lance Armstrong and the Livestrong foundation's fight against cancer through an interactive campaign called the "Chalkbot" during the 2009 Tour de France. The Chalkbot allowed spectators to submit messages via SMS, twitter, and a website that were then printed in yellow chalk on roads for viewers. Over 36,000 messages were received, helping raise $4 million for Livestrong and increasing Livestrong product sales by 46%.