AMMAN/BEIRUT (Reuters) - Rebels shot down a second Syrian warplane in less than a month on Tuesday and a monitoring group said they captured its pilot in an area near Aleppo where heavy fighting has erupted in recent days despite a cessation of hostilities agreement. The Syrian army said the jet was shot down with an anti-aircraft missile, which have been long demanded by foreign-backed rebels against devastating aerial raids by Syrian and, since September, Russian forces. Rebels said the plane was downed with anti-aircraft guns.