Fearless ISIS recruits in Yemen may have completed jihadi training, but not before being subject to an excruciating hazing routine.
Iran-aligned Houthis have lost much territory in a two-year-old civil war but still control the capital city.
Al-Qaeda in the Arabian Peninsula has taken advantage of conflict in the region.
A truce, announced on Saturday by Saudi Arabia, has seen reduced fighting but has been repeatedly violated by both sides.
Islamabad will not sanction support for Saudi airstrikes over concerns of stoking anti-Shia sentiment, say analysts.
Food, water and electricity shortages throughout country as foreign warship reported shelling Houthi positions outside city.
Houthi leader calls Saudi Arabia "Satan's horn" as airstrike campaign supporting embattled Yemeni president enters second day.
Iranian-allied Houthis besiege Yemeni president's base as Saudi Arabia deploys a reported 150,000 troops and 100 warplanes.
Guards at the presidential palace housing the main office of the president said they handed over the compound to Houthi fighters after a brief clash.