MT. VERNON — — The official grand opening and ribbon cutting of the UpStart Art Mart was held Friday. The shop, located in the 800 block of Broadway, features the work of local artists. Volunteers maintain and manage the facility, which will be open Friday, Saturday and Sundays. The mart is sponsored by the Downtown Mt. Vernon Development Corporation, and was created as a venue for local artists to sell their work, DMDC member Rex Cusumano said. "We want to encourage our local artists to be part of this community," Cusumano said.