Join the NDSC for the 52nd Annual National Down Syndrome Congress Convention. Each year, thousands of people come from around the globe to attend the National Down Syndrome Congress Convention.  For many, it's to hear from world-renowned experts; for others, it's to take a one-of-a-kind vacation.  But what brings everyone of us back, year after year, is the feeling of an international family reunion found nowhere other than at the NDSC Convention weekend.