In the clarifying words of National Security Council spokesman Tommy Victor, “ moving around’ means proliferation”, as in transferring them to Hezbollah, re the chemical weapons!
We do know that there are five main chemical facilities in Syria, scattered around the country and maybe two dozen lesser sites. The Syrians have a limited number of Scud missiles, maybe 150 or so—capable of fitting a chemical warhead. Most are in the south in range of Israel.
Preempting Syrian chemical weapons use or trying to prevent repeated use would require a substantial and extended air campaign.
Realistically the situation would demand the use of ground forces. In effect Syria’s chemical weapons become a different sort of red line—to foreclose American intervention of any sort.
Source—weekly standard, tom donnelly