A radical Muslim cleric banned from two different countries snuck into the United States through Mexico, affirming several reports that Middle Eastern terrorists regularly enter the country through the porous southern border. The Tunisian imam (Said Jaziri) has an international criminal past. Jaziri once led the largest mosque in Montreal where he advocated Sharia. Increasingly, a growing number of Islamic extremists are slipping into the U.S. from Mexico from terrorist nations like Yemen, Iran, Sudan, Somalia and Afghanistan. In 2007, the top Homeland Security official in Texas confirmed that terrorists with ties to Hezbollah, Hamas and Al Qaeda had been...