S.H.I.E.L.D. agent Sitwell is assigned to recover an abandoned Chitauri weapon being used by a young couple robbing a bank.S.H.I.E.L.D. agent Sitwell is assigned to recover an abandoned Chitauri weapon being used by a young couple robbing a bank.S.H.I.E.L.D. agent Sitwell is assigned to recover an abandoned Chitauri weapon being used by a young couple robbing a bank.