i have a 2 hour long layover in philly on my way to europe and about 3 hrs on my way back. are there any local types restaurants in the int'l terminal? or is there any good cheap eats spots i could venture out into the city to do? is there a subway to get there? i would love to try an authentic philly cheesesteak, but i've heard that could be bad to sit on the plane after! is it worth it? where is the best?