A turning point in war on terror?

The death of the al-Qaeda leader and mastermind behind the 9/11 attacks, Osama bin Laden, raises the question: is this a turning point in the war on terror? From the FT's London newsroom, senior foreign affairs columnist Gideon Rachman and Middle East editor Roula Khalaf discuss the consequences for US president Barack Obama, north Africa, Pakistan and Afghanistan. They suggest al-Qaeda is far from dead, but in the Middle East has become more irrelevant after the Arab Spring.