Israel is signaling a wider campaign against Houthi militants in Yemen, a mountainous and impoverished country more than 1,000 miles from Israeli territory.

Israel has severely weakened Hamas and Hezbollah. Now it's going after another member of Iran's so-called axis of resistance: the Houthi rebels of Yemen.

Emboldened by the results of 14 months of regional war, and backed by the U.S., Israel has steadily intensified its bombing attacks against Yemen. On Thursday, Israel launched a wave of airstrikes on Yemen’s capital and the port of Hodeidah,