The 2 Km range of a flat-faced re-purposed GRAD able to carry Sarin is about 10 times less than the ~20 Km range of a GRAD artillery rocket.
Almost got to wonder if some genius didn’t fire it expecting to hit the center of the city (i.e. the Government controlled area) and then watch it fall short into his own neighborhood.
But the truth is more horrible. The rebels deliberately Sarin-bombed a neighborhood they controlled in an attempt to unseat Assad. And - at least after the fact - they had the support of the US State department.
Exactly- and MI6 probably knew better, and that’s why Cameron backed off talk of military action