. Congressional Research Service, 0000. Liana Sun Wyler, Pervaze A. Congressional Research Service, 0000. Liana Sun Wyler, Pervaze A. Congressional Research Service, 0000. Congressional Research Service, 0000. Congressional Research Service, 0000. Congressional Research Service, 0000. Congressional Research Service, 0000. Congressional Research Service, 0000. Congressional Research Service, 0000. 