No, there is a walkway to the international terminal. Takes 1-2 minutes to walk.
From the "A" international gates we were unable to get to terminal 3 without leaving security, and thus unable to take advantage of this lounge.
No you won't.
It depends on what side of the International Terminal you airline is.
No need to go back through security. You can use the secure walkway to avoid having to go through security again.
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