What is my goal in part III?

Hint 1 of 6:

How far have you played into this section?

Hint 2 of 6:

Several events are packed into the early section of this section.

Hint 3 of 6:

One of the earliest, and most important, is Perelman informing you that
Washington believes your recordings from part II were faked.

Hint 4 of 6:

Not long after, there are other events that helps your goals in part III
become evident.

Hint 5 of 6:

Your have two goals in this section of the game.  (Do not read the next two
hints unless you really don't know what your goal is in this section.)