The Lebanese militant group captured an advanced Israeli anti-tank missile in the 2006 war, and its ally, Iran, reverse-engineered it, Israeli officials say.

For years, Israelis were told that in the next war with Hezbollah, the Lebanese militia would fire thousands of rockets and missiles a day, overwhelming their air defenses, causing blackouts, death and destruction.

The group’s supporters remain steadfast in the face of widespread displacement and thousands of deaths.

As U.S. diplomat Amos Hochstein visited the region to push for a ceasefire, Israel struck Beirut’s southern suburbs and the eastern Bekaa region, and a barrage of rockets fired from Lebanon killed a man in northern Israel.

These missiles have a range of up to 10 miles and they carry advanced guidance seekers to track and lock onto targets.