Globalization is an epitome of the world economy depicting cross border trade investment and cultural exchange. With many positive phenomena of globalization, flows some negative aspect too. One of the major threat to globalization is terrorism. Terrorism is an intentional act which includes grave and provocative violence against the state and its subjects by a group of people with political and religious motive. Al-Qaeda with its grave activities was successful in registering its name in black letters with 9/11 episode. Shayukh Osama Bin Laden deeds even after his death lead him to the FBI's most wanted list and also elevated it in the American Psyche as terror. The Author will re-examine the security challenges faced by the US administration in the post 9/11. This paper throws light on how the terrorism has taken the front foot on global platform in the post 9/11 era. This paper will also give an insight of various shades of Global jihad and how it highlighted the Islam. It will also reveal that, how in the name of jihad; Al-Qaeda has carried attack on various communities across the globe.