Ghaith Omran/AFP/Getty Images
Tunnel bomb: Seen from Tel al-Sawadi, a large explosion rips through what it is believed to be the Wadi Deif
Syrian army base in northwestern Idlib. The Syrian Observatory for Human Rights said Islamist
rebels detonated explosives planted in a tunnel under the base, killing or injuring dozens.
Opposition fighters have been trying to capture the base for over a year.