A wave of criminal violence is sweeping across northern Mexico.  This has led to complaints from U.S. political leaders, including Texas Governor Rick Perry about threats to U.S. communities along the border.  But FBI statistics show cities and towns on the U.S. side of the border have lower crime rates than most of those found in other parts of the country.  One of the most prosperous and peaceful places on the border is McAllen, Texas, in the lower Rio Grande River Valley, where VOA’s Greg Flakus filed this report.