A second tanker dispatched by Iran was welcomed Monday by Venezuelan naval frigates and helicopters as it entered national waters, a lifeline for embattled Venezuelan President Nicolás Maduro that reflects the closer ties being forged between Tehran and U.S. adversaries in Latin America. The first of five tankers carrying 1.5 million barrels of gasoline, the Fortune, arrived in the predawn hours at El Palito, a refinery near Puerto Cabello, in defiance of U.S. sanctions that largely prohibit oil trading with the fuel-starved…