Staff photo by REID SILVERMAN Volunteer Mike Rones, left, and Colleen Malebranche, the Neighborhood Revitalization Initiative coordinator for Patuxent Habitat for Humanity, help add new siding Saturday to the home of Army veteran Leonard Mackall during a veterans build project in Lexington Park. Mackall, an Army National Guard vet who sustained an injury last year, received help on his house from the joint efforts of volunteers from Christmas in April and Patuxent Habitat for Humanity thanks to a Thrivent Builds Repairs grant.