• Sydney siege: What could have prevented it?  Monday, 15 Dec 2014 | 6:33 PM ET

    Terrorism acts are evolving into small-scale activities and western democratic societies face "significant limitations" in stopping them, says Levi West, Lecturer, Terrorism and National Security at Charles Sturt University.

  • Sydney siege ends after shootout; three dead  Monday, 15 Dec 2014 | 6:09 PM ET

    The lone gunman was among the three killed after police stormed a cafe to end the 16-hour siege in Sydney. CNBC's Matthew Taylor reports from Martin Place.

  • Sydney siege: Understanding lone wolf terrorism  Monday, 15 Dec 2014 | 5:11 PM ET

    Anthony Roman, Founder & CEO at Roman & Associates, describes the hostage taker in Australia's cafe siege as a "lone wolf threat", which is the most difficult type of threat to guard against.

  • Australian PM addresses Sydney siege  Monday, 15 Dec 2014 | 4:29 PM ET

    Australian Prime Minister Tony Abbot holds a briefing after 17 hostages were held at the Lindt Cafe for over 16 hours. Two hostages died and four others were injured.

  • Australians take to Twitter to support Muslims Monday, 15 Dec 2014 | 2:29 PM ET
    People run with there hands up from the Lindt Cafe, Martin Place during a hostage standoff on December 15, 2014 in Sydney, Australia. Police stormed the Sydney cafe as a gunman has been holding hostages.

    Australians offered to travel with Muslim Australians who feared they might be targeted because of their religious affiliations.

  • Sydney hostage stand-off's tragic ending  Monday, 15 Dec 2014 | 1:07 PM ET

    CNBC's Mandy Drury says there are reports three people have died after hostages were held at the Lindt Cafe for over 16 hours, and insight to who the alleged gunman Shiekh Haron is.

  • Just the beginning for Australia: Rafiq  Monday, 15 Dec 2014 | 1:07 PM ET

    After hostages were held at the Lindt Cafe for over 16 hours, former UK government counter extremism task force member Haras Rafiq of Quilliam Found, weighs in on just what the gunman may have wanted.

  • Police: Cafe siege isolated incident  Monday, 15 Dec 2014 | 1:07 PM ET

    New South Wales Police hold a news conference after 17 hostages were held at the Lindt Cafe for over 16 hours. Two hostages died and four others were injured.

  • Footage of Australia gunman Sheikh Haron  Monday, 15 Dec 2014 | 11:30 AM ET

    CNBC's Kayla Tausche shows footage of alleged Australian gunman Sheikh Haron.

  • How US preps for potential terror attack  Monday, 15 Dec 2014 | 11:28 AM ET

    Former Assistant Secretary for the Department of Homeland Security, Bob Liscouski, discusses how the United States is preparing for, and would deal with a terrorist attack similar to the one that took place in Australia.

  • Former U.S. Ambassador to Australia, Edward Gnehm, discusses how social media makes it easier for extremists to communicate and carry out terrorist actions.

  • Flash bangs & stun grenades disable gunman: 7 News  Monday, 15 Dec 2014 | 11:06 AM ET

    Reporters from Australia's 7 News provide the latest details on the events that lead to the police storming the Australia cafe and taking the gunman down.

  • Sydney hostage siege over: Police  Monday, 15 Dec 2014 | 10:45 AM ET

    CNBC's Carl Quintanilla says police are reporting the situation in Australia is over. Mandy Drury reports 2 people are dead and 3 are gravely injured, and there is no word on the state of the hostage taker.

  • Sydney siege: Assessing the danger  Monday, 15 Dec 2014 | 10:38 AM ET

    Former NYPD commissioner Howard Safir weighs in on the hostage situation and police strategy in Sydney, Australia.

  • Gunfire rocks Australia café  Monday, 15 Dec 2014 | 10:28 AM ET

    CNBC's Carl Quintanilla shows video of shots being fired by police at the Sydney, Australia cafe. Mandy Drury, provides insight.

  • Sydney gunman identity known  Monday, 15 Dec 2014 | 8:53 AM ET

    NBC News' Sara James provides an update on the believed identity of the gunman holding hostages captive in Sydney, Australia.

  • Sydney crisis: What we know  Monday, 15 Dec 2014 | 8:00 AM ET

    CNBC's Matt Taylor provides insight to what is believed to be a lone wolf armed assailant in a Sydney cafe holding an unclear number of hostages captive.

  • Sydney hostage stand-off  Monday, 15 Dec 2014 | 7:03 AM ET

    A gunman is holding an unclear number of hostages inside a cafe in downtown Sydney, reports CNBC's Matt Taylor. Five hostages have emerged, and it is unclear exactly how they fled.

  • New details emerge in Sydney hostage standoff  Monday, 15 Dec 2014 | 6:02 AM ET
    A hostage runs to armed tactical response police officers for safety.

    CNBC's Matt Taylor reports five of the hostages inside a Sydney cafe have emerged from the building.

  • Discussing the unfolding events of the Sydney hostage situation, Benjamin MacQueen, senior lecturer of Politics and International Relations at Monash University, discusses whether the Australian government could have predicted this event.