This presentation is about vLab Manager, a software tool for developing and deploying virtual training environments. It discusses how NATO used vLab Manager to rapidly deploy class setups for international cyber defense exercises. vLab Manager masks virtualization complexities and allows agile creation and deployment and sanitation of training simulations. Its key features include creating exercise definitions, mapping definitions to resources, deploying VMs to sandboxes, troubleshooting, and undeploying VMs.