Belgium Bomb Maker Dead?, Death Toll Climbs, More Attacks Planned

Obama: We will go after ISIS until it's 'finally destroyed'. President Barack Obama pledged Wednesday to "defeat" those who threaten the world with terrorism. The United States will "continue to go after ISIL aggressively until it's removed from Syria and from Iraq and finally destroyed," Obama said, using another name for ISIS. "The world has to be united against terrorism," Obama said, adding that "that's a top priority of ours." He added that "we can and we will" defeat terrorism. At the same time, he said, ISIS "is not an existential threat" to the U.S. He was speaking at a news conference in Argentina. Brussels attack: 2 brothers ID'd as suicide bombers, 1 suspect 'on the run'. Several bombers are dead. At least one alleged attacker is still on the loose. And a key question looms as investigators race to piece together details about the attackers behind Tuesday's deadly bombings in Belgium's capital: Were these men acting alone, or were other members of a terror cell supporting them? Two of the bombers were brothers, officials said. Belgian federal prosecutor Frederic Van Leeuw identified Ibrahim El Bakraoui as one of two suicide bombers at the Brussels airport and his brother, Khalid El Bakraoui, as the man behind a deadly suicide blast about an hour later on a train near the Maelbeek metro station. And one of the bombers at the airport may be the man authorities named as a suspect in the Paris terror attacks. Belgian investigators believe that the second suicide bomber killed in the Brussels airport was alleged bomb-maker Najim Laachraoui, multiple European officials told CNN. They have not established his identity conclusively, a senior Belgian counterterrorism official told CNN's Paul Cruickshank, and are checking against DNA and fingerprint records.