national reconnaissance office: an intelligence agency in the United States Department of Defense that designs and builds and operates space reconnaissance systems to detect trouble spots worldwide and to monitor arms control agreements and environmental issues and to help plan military operations
intelligence: a unit responsible for gathering and interpreting information about an enemy
tree fern: any of numerous usually tropical ferns having a thick woody stem or caudex and a crown of large fronds; found especially in Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae