Got multiple levels of KML documents within a KMZ working.
Got multiple levels of KML documents within a KMZ working.

AnalyticalGraphicsInc/cesium,NaderCHASER/cesium,likangning93/cesium,ggetz/cesium,emackey/cesium,denverpierce/cesium,CesiumGS/cesium,denverpierce/cesium,aelatgt/cesium,AnimatedRNG/cesium,oterral/cesium,geoscan/cesium,jason-crow/cesium,wallw-bits/cesium,soceur/cesium,hodbauer/cesium,AnimatedRNG/cesium,ggetz/cesium,esraerik/cesium,YonatanKra/cesium,NaderCHASER/cesium,CesiumGS/cesium,kiselev-dv/cesium,progsung/cesium,jason-crow/cesium,wallw-bits/cesium,likangning93/cesium,AnimatedRNG/cesium,wallw-bits/cesium,CesiumGS/cesium,omh1280/cesium,wallw-bits/cesium,esraerik/cesium,aelatgt/cesium,josh-bernstein/cesium,omh1280/cesium,kaktus40/cesium,kaktus40/cesium,ggetz/cesium,jason-crow/cesium,progsung/cesium,soceur/cesium,emackey/cesium,oterral/cesium,likangning93/cesium,esraerik/cesium,geoscan/cesium,emackey/cesium,jason-crow/cesium,soceur/cesium,aelatgt/cesium,kiselev-dv/cesium,denverpierce/cesium,CesiumGS/cesium,jasonbeverage/cesium,oterral/cesium,ggetz/cesium,AnalyticalGraphicsInc/cesium,likangning93/cesium,esraerik/cesium,YonatanKra/cesium,AnimatedRNG/cesium,likangning93/cesium,emackey/cesium,NaderCHASER/cesium,hodbauer/cesium,CesiumGS/cesium,YonatanKra/cesium,hodbauer/cesium,omh1280/cesium,jasonbeverage/cesium,omh1280/cesium,kiselev-dv/cesium,josh-bernstein/cesium,denverpierce/cesium,YonatanKra/cesium,aelatgt/cesium,kiselev-dv/cesium