Middle Easterners still have not figured out the large crowd problem

SANAA, Yemen -- A suicide attacker set off a massive car bomb in Yemen’s southern city of Aden on Monday, killing at least 45 pro-government troops who had been preparing to travel to Saudi Arabia to fight Houthi rebels in Yemen’s north, officials said.
The men were at a staging area near two schools and a mosque where they were registering to join the expedition. The Saudis hope to train up to 5,000 fighters and deploy them to the Saudi cities of Najran and Jizan, near the border, Yemeni security officials said. Over 60 wounded were being taken to three area hospitals, they added.

I count some ten times that middle eastern authorities required young men to crowd up in the street as part of police employment. The crowd generally gets blown up, but recruits do it again and again.