In reality AL-Mahdi was secretly sent from Iran to Syria to protect and hide him from the expected Israeli strike on Iran. Syria took all precautions and disguised the hole Al Mahdi was put in as a nuclear bomb assembly plant. Unfortunately for Al Mahdi this fooled Israel too that bombed the place and got rid of Al Mahdi by mistake.
Pro-Hadi forces recapture Yemen's al-Anad military and air base, hundreds of Houthis flee (Reuters)
from the article: Inside Intel / Not a reactor - something far more vicious