IS THIS A CHEM-TRACKING DEVICE BEING DROPPED NEAR SAN DIEGO??

What are they (the government) dropping on us from the sky? I am interested in hearing if anyone has a theory about this. If you have a "rational explanation" or even not so rational explanation for what in the world this is, please tell me because this one is a new one on me. 
-W.E. 

Crrow777
h/t Nena S.