What initiates the operation for CD reconnaissance teams?

The initiation of operations for Chemical, Biological, Radiological, and Nuclear (CBRN) reconnaissance teams is correctly identified as stemming from a mission request. A mission request typically triggers the need for reconnaissance, outlining specific tasks and objectives that need to be accomplished. This request is essential as it formally communicates the requirement for reconnaissance operations, ensuring that teams are prepared and mobilized based on the operational needs identified.

While the other options like OPORD, WARNORD, and planning orders are crucial documents that provide further instruction, detailing aspects of the mission, they come into play after the initial mission request is made. The OPORD (Operation Order), for example, provides comprehensive directives once a mission has been confirmed, outlining the execution of the operation. A WARNORD (Warning Order) serves as an early notification of an impending operation but does not itself initiate the mission. The planning order aids in the structuring and organization of the forthcoming operations but follows after the mission initiation. Therefore, the mission request is vital as it acts as the catalyst for mobilizing reconnaissance activities.