“Yemen is the latest domino to fall in the chain of instability set off by the U.S. war with Iran, a development that deepens the risk to global energy supplies and complicates efforts to find a diplomatic off-ramp to the conflict,” the Wall Street Journal reports.“The impoverished country has long been at war in a forgotten corner of the world. But the lightning offensive by Iran-backed Houthi militants who seized key territory around the strategic Bab al-Mandeb Strait last week has made Yemen an important variable in the growing set of interlocked regional conflicts that are stretching America’s military capabilities and handing more leverage to Tehran.”“The U.S. conflict with Iran had already sparked a new war in Lebanon between Israel and Hezbollah and pulled in Iraqi militias that had largely sat out three years of war in the region.”