A Russian Sukhoi Su-34 fighter drops bombs above the Syrian village of Kafr Ain in the southern countryside of Idlib province Photo: AFP
US sends 100 extra troops to remote Syria base after Russia threatens attack
Base is used by US special forces to train Syrian fighters who are confronting Islamic State militants
A Russian Sukhoi Su-34 fighter drops bombs above the Syrian village of Kafr Ain in the southern countryside of Idlib province Photo: AFP