Israel is using generous funding from Washington and lessons from its 50-day anti-rocket war in Gaza to fortify Iron Dome against far more formidable threats looming beyond its northern border.

With an estimated 100,000 rockets in the hands of Lebanon-based Hezbollah and war raging beyond its border with Syria, officials here say Iron Dome’s performance against Gaza-launched threats may be merely a warm-up for much hotter wars to come.

Official data from the Protective Edge operation credits Iron Dome batteries with 735 intercepts, which represents about 90 percent of the Gaza-launched projectiles which, without the defense, would have landed in populated areas. A large portion of Gaza-launched rockets either failed to reach Israel or were classified by Iron Dome as “non threats” headed for open areas. […]