WASHINGTON, Nov. 18 (TNSrep) -- The Government Accountability Office issued the following report: Here are excerpts: * * * Fast Facts Since 1974, the Shadow Wolves--a highly trained Native American investigations unit--have used traditional and modern methods to combat smuggling from Mexico to the Tohono O'odham Nation reservation in Arizona. They're part of U.S. Immigration and Customs Enforcement. We assessed ICE's progress in addressing our 6 prior recommendations to improve the Shadow W  more