Second, we'll keep pursuing diplomatic solutions to end the conflicts in Iraq and Syria that are fueling ISIS, while intensifying our strikes on their strongholds. The 9/11 attacks proved that allowing terror groups to create safe havens to operate overseas poses a direct threat to our national security. We also need to go after their leader, Abu Bakr al-Baghdadi, with the same fierce determination that we brought to apprehending Bin Laden. ISIS cannot be contained; it must be defeated. So America must make sure that local and regional ground troops have the resources they need to take the fight to the group's leaders, without putting U.S. boots on the ground.