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- For other characters, see Walker.
Sergeant Walker is Sgt. Patrick O' Neil's squad mate in Call of Duty: Modern Warfare: Mobilized. He, along with O' Neil and Bell were the most prominent members of Gopher Squad.
Walker appears in the British campaign levels "Distant Information", "Wrecking Crew", "Interception", "Hostile Territory", "Informant Extraction", "Winter Assault", and "Last Chance".
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