The last remaining EXO-7 Falcon mechanical harness was custodied in Fort Meade, behind three guarded gates and a twelve-inch steel wall, after being used in different mission by members of the Air National Guard in Afghanistan.
Sam Wilson offered his help to Steve Rogers and Natasha Romanoff to kidnap Jasper Sitwell, the agent they could link to the ongoing conspiracy within S.H.I.E.L.D. due to his presence on the Lemurian Star. Wilson handed them a dossier about the mechanical harness he used in his missions with the military, including one that Romanoff recognized to apprehend Khalid Khandil.
Wilson revealed its location and conditions under it was custodied. Romanoff indicated that it shouldn't be a problem with a gesture, and she departed with Rogers to retrieve it, managing to infiltrate Fort Meade and steal the harness unharmed.