Des Moines has landed two more cycles of the AAU Junior Olympic Games, in 2018 and 2023, the Greater Des Moines Convention and Visitors Bureau announced today. The announcement comes amid preparation for the 2014 event, which is set to take place in Des Moines from July 22 to Aug. 2. The bureau said an additional 650 volunteers are needed for this month's games. Volunteers are needed in the areas of event assistance, awards assistance and registration. To sign up, click here.