Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

An Israeli army officer gives journalists a tour, Friday, July 25, 2014, of a tunnel allegedly used by Palestinian militants for cross-border attacks, at the Israel-Gaza Border. A network of tunnels Palestinian militants have dug from Gaza to Israel, dubbed "lower Gaza" by the Israeli military, is taking center stage in the latest war between Hamas and Israel. (AP Photo/Jack Guez, Pool)
An Israeli army officer gives journalists a tour, Friday, July 25, 2014, of a tunnel allegedly used by Palestinian militants for cross-border attacks, at the Israel-Gaza Border. A network of tunnels Palestinian militants have dug from Gaza to Israel, dubbed "lower Gaza" by the Israeli military, is taking center stage in the latest war between Hamas and Israel. (AP Photo/Jack Guez, Pool)

    JUST WATCHED

    Lifeline to deathline: Gaza's tunnels

MUST WATCH

Lifeline to deathline: Gaza's tunnels

CNN's Jake Tapper examines how Hamas is using Gaza's tunnels to export death to Israel.

Lifeline to deathline: Gaza's tunnels

CNN's Jake Tapper examines how Hamas is using Gaza's tunnels to export death to Israel.