BEIRUT — Syrian insurgents have breached Syria’s second largest city, Aleppo, after blowing up two car bombs and were clashing with government forces on Friday, according to a Syria war monitor and fighters.Insurgents have been approaching Aleppo city for days and have seized several towns and villages along the way.The Syrian Observatory for Human Rights, a war monitor, said the insurgents blew up two car bombs at the city’s western edge on Friday.An insurgent commander issued a recorded message posted on social media calling on the city’s residents to cooperate with the advancing forces....