US drone strike has struck down upon the leader of al-Qaida Ayman al-Zawahiri in Afghanistan as announced by Joe Biden. The US president described the death of Zawahiri, who was successor after Osama bin Laden as a major blow to the terrorist chain. al-Qaida have been associated with heinous attack of 9/11 in 2001, Twin Tower which killed many people and devasted, and destroyed the country from...