get_terms does not return any results for my custom taxonomy?

If I go to wp-admin/edit-tags.php?taxonomy=location then I correctly see a list of terms.

If I loop through:

get_terms("category");

Then I correctly see several terms for the taxonomy of category. Have I created my custom taxonomy incorrectly for the same function not to output any results for my taxonomy?

get_terms("location");

register_taxonomy('location', 'post', 
array(      
  'labels' => array( 'name' => _x( 'Locations',
    'taxonomy general name' ), 
    'singular_name' => _x( 'Location', 'taxonomy singular name' ), 
    'search_items' => __( 'Search Locations' ), 
    'all_items' => __( 'All Locations' ), 
    'parent_item' => __( 'Parent Location' ), 
    'parent_item_colon' => __( 'Parent Location:' ), 
    'edit_item' => __( 'Edit Location' ), 
    'update_item' => __( 'Update Location' ), 
    'add_new_item' => __( 'Add New Location' ), 
    'new_item_name' => __( 'New Location Name' ), 
    'menu_name' => __( 'Locations' ), 
  ),     
  'rewrite' => array( 'slug' => 'locations',   
  'with_front' => false,   
  'hierarchical' => true   
  ), 
)
);

If you are trying to use all of the terms in that taxonomy for something, try this:

get_terms( "location", array( "hide_empty" => 0 ) );

You may be trying to return taxonomy terms that have no relationship to any object.