"We are looking at 15 or 20 years that Hezbollah has been setting up shop in Mexico," the agent told 10News.Since the Sept. 11, 2001, terrorist attacks, U.S. policy has focused on al-Qaida and its offshoots."They are more shooters than thinkers … it's a lot of muscles, courage, desire but not a lot of training," the agent said, referring to al-Qaida.Hezbollah, he said, is far more advanced."Their operators are far more skilled … they are the equals of Russians, Chinese or Cubans," he said. "I consider Hezbollah much more dangerous in that sense because of strategic thinking; they think more long-term."Hezbolah has operated in South America for decades and then Central America, along with their sometime rival, sometime ally Hamas.Now, the group is blending into Shi'a Muslim communities in Mexico, including Tijuana. Other pockets along the U.S.-Mexico border region remain largely unidentified as U.S. intelligence agencies are focused on the drug trade."They have had clandestine training in how to live in foreign hostile territories," the agent said.