How long is the Modern Warfare 3 (MW3) campaign?

If you want to know how long the Modern Warfare 3 campaign is, read on.
How many hours does it take to beat the MW3 campaign?

Modern Warfare 3 campaign mission list and rewards

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Modern Warfare 3' mission list and 'MW3' campaign length

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How long is the Call of Duty MW3 campaign?

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