Which of the following is NOT included in the six missions of a MLR?

The mission of a Marine Littoral Regiment (MLR) emphasizes its role in supporting naval operations and facilitating maneuver warfare in the maritime environment. While air and missile defense, information environment operations, and strike capabilities are integral to the MLR's operational framework, fire support coordination is typically associated with the broader role of a Marine Expeditionary Force or a Marine Expeditionary Brigade, rather than being a direct mission assigned to the MLR.

Fire support coordination involves the planning and integration of indirect fire and close air support, which is more a function of larger operational commands that have a wide range of assets at their disposal. This operational layer allows for a more comprehensive approach to combat operations, whereas the MLR focuses on swift maneuvers, integration of ground and maritime forces, and maintaining a presence in line with the naval and joint operational strategy.

In summary, while fire support coordination is crucial for effective combat operations, it does not directly fall under the specified missions of the MLR, making it the correct response.