TEL AVIV, Israel(AP)Two Palestinian suicide bombers set off back-to-back blasts Sunday in a central Tel Aviv area crowded with foreign workers, killing 23 bystanders and wounding more than 100 in the bloodiest attack in six months. Hours later, Israeli attack helicopters fired at least four missiles at metal workshops in Gaza City, witnesses said. Eight people were slightly injured. The Israeli military said the workshops were used for making weapons, including mortars and rockets. In Rafah, on the Gaza-Egypt border, Israeli forces destroyed a house belonging to an Islamic Jihad leader, Palestinians said. The Al Aqsa Martyrs