One of the reasons why ISIS is continuing to call for the assassination of Egyptian President Fattah al-Sisi is because he is destroying the infrastructure terrorists need to carry out their plans.
Last July/August Egyptian military began destroying Hamas terror tunnels in the Sinai region and Gaza.   In a remarkable discovery hidden by western media a full ONE THIRD of all border homes contained terror tunnels into Gaza.  As a consequence of the scope al-Sisi ordered an expanded security perimeter and all border homes destroyed.
Today Egyptian media are reporting on another tunnel discovered, the size of it explains how committed the Muslim Brotherhood is to the destruction of Israel.  Unreal. 

EL-ARISH, Egypt – Egyptian security officials say they have found a 1.5-mile smuggling tunnel leading into the Gaza Strip, the longest such passageway discovered in their crackdown on cross-border smuggling.
They say the tunnel was operated by the military wing of the Palestinian Hamas movement, the Izzedine al-Qassam Brigades, which Egypt says is a terrorist organization that played a role in recent attacks against Egyptian security forces.
Detonators and communications devices were among the devices found in the tunnel, which will be destroyed, officials say, speaking on condition of anonymity because they aren’t authorized to brief reporters.
After a major attack in October, the Egyptian military began clearing a buffer zone along the border with Gaza in an attempt to stamp out a cross-border network of tunnels that Hamas considers a lifeline. (link)