The Defense Advanced Research Projects Agency (DARPA) Defense Sciences Office (DSO) is sponsoring a collateral SECRET Industry Day to provide information to potential proposers on the objectives of an anticipated Program Solicitation (PS) for the Fox Tail program. The Industry Day will be held on August 31, 2026, from 8:00 a.m. to 4:00 p.m. Eastern Time (ET) in Arlington, VA. The event will not be webcast. Advance registration is required for attending the Industry Day.