After the attack of 9/11, the world’s views on terrorism drastically changed and it led to the new “war on terror” which means to prevent terrorism. The US took some desperately needed some actions to control the growing risks of terrorism. Terrorist attacks can be devastating for national security and the US has created the DHS to fight against terrorism. It can be a said that the war on terror is an ongoing fight between the security agencies and the terrorist organizations. War on terror includes various counter terrorism strategies and approaches to deal with the problem of terrorism plaguing the world.