[frog in a pot]

Thank you for the info. It fits in with this provided elsewhere by cincinnati65:

The rebels captured Al-Safira in April. Al-Safira was one of Syria's largest chemical weapons facilities.

[Whenifhow]

Syria: Al-Qaeda’s battle for control of Assad’s chemical weapons plant
TelegraphUK ^ | 6:00PM BST 27 Apr 2013 | Colin Freeman.
http://www.freerepublic.com/focus/f-news/3013245/posts

Syrian rebels said close to chemical weapons cache
http://www.timesofisrael.com/syrian-rebels-said-close-to-chemical-weapons-cache/