| − | North American Aerospace Defense Command is a "bi-national command of the US and Canada that provides aerospace surveillance, warning and assessment of aerospace attack, and maintains the sovereignty of US and Canadian airspace. Also called NORAD."[http://www.thefreedictionary.com/North+American+Aerospace+Defense+Command] | + | '''North American Aerospace Defense Command''' is a "bi-national command of the US and Canada that provides aerospace surveillance, warning and assessment of aerospace attack, and maintains the sovereignty of US and Canadian airspace. Also called NORAD."[http://www.thefreedictionary.com/North+American+Aerospace+Defense+Command] |