def get_mission_area(label):
    """ Search a PDS4 label for a Mission_Area.

    Parameters
    ----------
    label : Label or ElementTree Element
        Full label for a PDS4 product with-in which to look for a mission area.

    Returns
    -------
    Label, ElementTree Element or None
        Found Mission_Area section with same return type as *label*, or None if not found.
    """

    return label.find('*/Mission_Area')