In a shocking event that unfolded today, thousands of Hezbollah fighters in Lebanon were injured, and at least three people were killed when their pagers exploded at the same time. Hezbollah is a powerful militant group in the Middle East, and these explosions have sparked fears of a new kind of attack—one that mixes technology and warfare in ways we’ve never seen before.

What Happened?

Hezbollah fighters often use pagers, small devices that can receive messages, as part of their secr...