Prof. Yonah Alexander, Director of the Potomac Institute for Policy Studies International Center for Terrorism Studies, says Israel's raid on an aid flotilla bound for Gaza has focused the world’s attention on expanding Middle East security challenges.  At the same time, the raid has become the center of an international controversy that poses fresh challenges for the Obama administration.  Prof. Alexander contributed to Canada's Global National network news coverage of the raid story. Click here to watch Global National's story including Prof. Alexander's comments.