By Michael Webster, Syndicated Investigative Reporter Early this month U.S. Border Patrol agents from the Tucson, Ariz. sector and agents of U.S. Immigration and Customs Enforcement were again fired upon with what appeared to be military type automatic weapons by Mexican drug smugglers dressed in military garb. Agents after observing a Flatbed tow truck on the Mexican side of the U.S. Mexican border backed up to the new international border fence. According to witnesses the tow truck backed up on a newly constructed earthen dirt berm which put the truck almost even with the height of the fence. The tow...