Sift the flour and salt together into a large mixing bowl.
With a pastry cutter (pastry blender), cut the shortening into the dry ingredients until the particles are like coarse meal.
Sprinkle in water, 1 tsp or so at a time, mixing lightly with a fork. Don't over mix or the crust will be tough. If your dough seems wet enough, you don't need to add all of the water.
Press the dough into a ball. It is okay if it is a little crumbly. In fact crumbly makes for a tender, flaky crust!
Separate the ball of pie dough into 2 balls: one for the bottom crust and one for the top.
Notes
The key to a perfectly flaky baked crustis to bake the assembled pie for 15-20 minutes in a 400 degree F oven. Then after this time slip a cookie sheet onto the rack below the pie pan, then reduce the temperature to 350 degrees F, and bake for 25-35 minutes more. Bake until the crust is golden brown and your filling is bubbling in the vents. The initial high temperature ensures that the bottom of the crust isn't soggy.