Israel's Iron Dome Defense Battled to Get Off Ground

TEL AVIV—Israel's Iron Dome rocket-defense system spent the past two weeks successfully blasting Hamas rockets out of the sky—many in dramatic nighttime explosions—helping to end the recent hostilities between Israel and Hamas in just seven days.

The battle to build Iron Dome, however, lasted years and provided fireworks of its own.

Before Wednesday's cease-fire, Iron Dome knocked down 421 rockets launched from Gaza and...