If Iam Correct, I believe he is killed in ," Loose Ends".
The fourth level in Call of Duty Modern Warfare is No Russian (which can be skipped.)
Level 42
nothing
You unlock it at level 36.
Level 38
You need to level and complete challenges
The Lieutenant Rank is at Level 34
If you're talking about the museum level from Modern Warfare 2, then probably not. That was a one time thing.
you have to be level 29
Like in Call of Duty Modern Warfare 1 it is called 'End game'.
The TMP is unlocked on level 58.
level 67