User blog comment:Cpt. John "Soap" MacTavish/What is the hardest MW2 level to beat on Veteran?/@comment-2149107-20100627033437

I havent beaten - Takedown - Contingency - Loose Ends - The Enemy of My Enemy - Just Like Old Times (Out of laziness)

I think it's Takedown because of most of the mission being solo and having no one to rely on.