Obama Says Defeating Islamic State a Long-Term Effort Requiring New Syrian Leader

US President Barack Obama used remarks at the beginning of a UN leaders’ summit on countering Islamic State and violent extremism on September 29 to say the battle against IS was a"long-term campaign – not only against this particular network, but against its ideology".

Obama also renewed his call for a move away from Bashar al-Assad as Syrian president. Credit: YouTube/US State Department, The White House