Two-year-old conjoined twins from the Philippines are "strong and stable" after a delicate separation surgery and are being closely monitored this morning. Officials at Montefiore Medical Center in the Bronx say Carl and Clarence Aguirre, born joined at the tops of their heads, survived the operation, which was completed just before 3:20 this morning. A hospital spokesman says Doctors, nurses and technicians applauded in the operating room as the twins' head-to-head operating tables were pulled apart slightly. The separation climaxed a gradual approach that lasted ten months, a departure from the more common marathon operations that have separated other conjoined twins. Doctors are warning that it will be months before the twins' conditions and the success of the separation can be fully assessed.