The Government Accountability Office (GAO)
“The U.S. Government Accountability Office (GAO) is known as "the investigative arm of Congress" and "the congressional watchdog." GAO supports the Congress in meeting its constitutional responsibilities and helps improve the performance and accountability of the federal government for the benefit of the American people.”
"The GAO generally does an excellent job of twisting bureaucratic arms to obtain information. . ."
- Janice Kephart, Director of National Security Policy at CIS