BEIRUT -- Syrian warplanes bombed an olive press factory in the country's north on Tuesday, killing and wounding dozens of people, including farmers who were waiting to convert their olives to oil, activists said.Two activist groups – the Britain-based Syrian Observatory for Human Rights and the Local Coordination Committees – said the targeted factory is west of the city of Idlib. The LCC says at least 20 people were killed and many others wounded in the raid, while the Observatory said "tens were killed or wounded."Both groups depend on a network of activists on the ground around the country.President Bashar Assad's regime has been launching intense air raids on rebels in recent months, mostly in Idlib, the nearby province of Aleppo, Deir el-Zour to the east and suburbs of the capital Damascus.The most recent air raids have killed hundreds of people, including eight children on Sunday in the village of Deir al-Asafir near the capital, Damascus."It is a sign of despair," said Hilal Khashan, a political science professor at the American University of Beirut. He added that the regime forces are overstretched, and the air force is being used in areas that the army cannot easily reach.