ALBANY, N.Y. â New York Army National Guard Col. Christopher Guilmette, a Voorheesville resident, is the new commander of the 53rd Digital Liaison Detachment, headquartered at the Park Avenue Armory in Manhattan. He replaces Col. Todd Bookless, who took command of the Digital Liaison Detachment in 2018. Bookless is going on active duty with the military's Northern Command in Colorado, Springs. The Digital Liaison Detachment, or DLD for short, works to coordinate, communicate and facilitate all aspects of military operations at higher level-headquarters. The DLD is specifically designed and dedicated to providing a critical capability for mission command liaison and interoperability.