NATO Secretary-General Anders Fogh Rasmussen announced Monday that the organization was planning to assemble a “spearhead” force that would be able to “travel light but strike hard if needed” in the face of Russia’s increasingly aggressive behavior in eastern Ukraine. The new expeditionary outfit would be manned by several thousand rotating allied troops who would be ready to respond by air or sea with the aid of special forces, explained Rasmussen. “The Readiness Action Plan responds to Russia’s aggressive behavior,” he told reporters in Brussels.