Final answer:
The detail mentioned in The Cultural Landscape that supports the United States government's belief that Pakistan had been providing sanctuary to Osama bin Laden at the time he was killed by U.S. Navy Seals is the proximity of bin Laden's bunker to the Pakistani military training facility.
Step-by-step explanation:
The detail mentioned in The Cultural Landscape that supports the United States government's belief that Pakistan had been providing sanctuary to Osama bin Laden at the time he was killed by U.S. Navy Seals is the proximity of bin Laden's bunker to the Pakistani military training facility. This detail suggests that the Pakistani government may have had knowledge of bin Laden's presence in the area and potentially allowed him to reside near a military facility for protection.