The Syrian regime has filed a formal complaint to the Lebanese government regarding watchtowers along the border, claiming they posed a threat to Syria’s national security. Syria’s foreign ministry submitted the “urgent” memorandum to its Lebanese counterpart earlier this week. The memo is expected to be directed to Lebanon’s Ministry of Defence and then to the Lebanese army. An appropriate response will then be sent back to Syria, sources say. A Syrian military and security delegation is reportedly scheduled to visit Lebanon to hold talks with officials regarding the British-funded observatio…