Israel has one of the world’s best defenses against missiles and rockets, but struggles to detect slower-moving unmanned aircraft, experts said.

Hezbollah’s deadly attack against an army base deep inside Israeli territory presents a major headache for Israel as it continues to struggle to defuse the threat posed by the group.

After the killing of four Israeli soldiers by a drone attack on Sunday night IDF Chief of Staff Herzi Halevi said 'We are at war'