How Yemen became the front line of a Mideast-wide war

Analysis, posted 04.24.2015, from Sanaa, Yemen, in:
Saudi Arabia has intervened more directly in Yemen than in the past. In light of this history, the Saudis are reluctant to send ground troops to fight the Houthis on Yemeni soil. But recent conflicts — in Iraq, Syria and Libya — show that air power alone is not enough to win a decisive victory. And the longer this conflict drags on, the more likely that the Houthis will gain wide popular support as the defenders of Yemen’s independence against an aggressive and meddling neighbor.