An armoured Israeli military vehicle drives along Israel's border with Egypt's Sinai peninsula, near the Nitzana crossing in this picture taken January 30, 2014. An Islamist insurgency boiling in the desert peninsula has claimed casualties among the Multinational Force and Observers (MFO), requiring new and often cumbersome precautions. And while participating countries do not say so publicly, there has been some behind-the-scenes debate over the MFO mandate at a period of unprecedentedly close Israeli-Egyptian security cooperation. In northeastern areas of Sinai once strictly demilitarised, Egypt, with Israel's consent, now routinely brings in troops,tanks, fighter jets and helicopters to fight insurgents. REUTERS/Amir Cohen/Files