Not all headaches represent migraines, and migraine is not the only condition that can cause severe and debilitating headaches. For example, cluster headaches are very severe headaches that affect one side of the head in a recurrent manner (occurring in a cluster over time).
The United States government is the largest issuer of debt securities, and its bonds are considered the safest fixed-income investments available to your customer.
The Canadian government debt, commonly called the  public debt  or the  national debt , is the amount of money owed by the Government of Canada to holders of Canadian Treasury security. In 2013, this number stood at CAD$1.2 trillion across federal and provincial governments.