Here's how Israel's 'Iron Dome' stops rockets — and why Ukraine doesn't have it

Some of the ways in which Hamas initially attacked Israel on the weekend — taking down communication towers with improvised explosives, paragliding over the border and gunning down civilians — subverted one of Israel's strongest defenses: its Iron Dome.

First deployed in 2011, the Iron Dome is a network of radar detectors and missile launchers that work together to intercept incoming rockets.

The highly sophisticated, multi-billion-dollar defense system has been under constant redevelopment since its inception in the early 2000s.

Here's how it works, who