After recalling terrorists attack on GHQ and operation Abbottabad and after considering on-going terrorists attack in Karachi on Naval Installations, I am of the firm view that CIA of USA is behind these activities to achieve ulterior motives. These activities have compelled me to say thanks to CIA as it has revealed the fact that how vulnerable is our national security? One can attack at any place by considering it as a soft target and could easily breach our sovereignty. Its time to review our national and foreign policies to secure our sovereignty and to improve our national security. KHALID MUSTAFA, Islamabad, May 23.