
An injured hostage is carried to an ambulance after shots were fired during a cafe siege at Martin Place in the central business district of Sydney, Australia, Dec. 16, 2014.
Rob Griffith/AP Photo

An injured hostage is wheeled to an ambulance after shots were fired during a cafe siege at Martin Place in the central business district of Sydney, Australia, Dec. 16, 2014.
Rob Griffith/AP Photo

Hostages run towards armed tactical response police as they run to freedom from a cafe under siege at Martin Place in the central business district of Sydney, Australia, Dec. 16, 2014.
Rob Griffith/AP Photo

Hostages emerge from a cafe under siege at Martin Place in the central business district of Sydney, Australia, Dec. 15, 2014.
Channel 9 Australia

A female hostage stands by the front entrance of the cafe as she turns the lights off in the Sydney central business district, Dec. 15, 2014.
William West/AFP/Getty Images

Two hostages, left, run for cover behind a policeman, right, during a hostage siege in the central business district of Sydney on Dec. 15, 2014.
William West/AFP/Getty Images

Two hostages run to safety outside the Lindt Cafe, Martin Place on December 15, 2014 in Sydney, Australia.
Mark Metcalfe/Getty Images

An armed tactical response police officer grabs a hostage as she flees from a cafe under siege at Martin Place in the central business district of Sydney, Australia, Dec. 15, 2014.
Rob Griffith/AP Photo

A hostage runs to armed tactical response police officers for safety after she escaped from a cafe under siege at Martin Place in the central business district of Sydney, Australia, Dec. 15, 2014.
Rob Griffith/AP Photo

Onlookers gather in Martin Place in the central business district of Sydney on Dec. 15, 2014. A gunman was holding hostages inside a Sydney cafe.
Peter Parks/AFP/Getty Images

Armed police patrol on Dec. 15, 2014 in Sydney, Australia.
Joosep Martinson/Getty Images

Armed police evacuates office staff next to a cafe in the central business district of Sydney on Dec. 15, 2014.
Saeed Khan/AFP/Getty Images

This image taken from video show people holding up what appeared to be a black flag with white Arabic writing on it, inside a cafe in Sydney, Australia, Dec. 15, 2014.
Channel 7 video/AP Photo

This image taken from video shows people holding up hands inside a cafe in Sydney, Australia, Dec. 15, 2014.
Channel 7 via AP

This image taken from video shows people against shop windows holding up hands inside a cafe in Sydney, Australia, Dec. 15, 2014.
Channel 7 via AP

Police evacuate people from an office building close to a cafe under siege at Martin Place in the central business district of Sydney, Australia, Dec. 15, 2014.
Rob Griffith/AP Photo

Armed police patrol on December 15, 2014 in Sydney, Australia.
Joosep Martinson/Getty Images

Construction workers gather in front of the Sydney Opera House after being evacuated on Dec. 15, 2014 in Sydney, Australia.
Joosep Martinson/Getty Images

An armed policeman is seen outside a cafe in the central business district of Sydney on Dec. 15, 2014.
Saeed Khan/AFP/Getty Images

Police stand at the ready close to a cafe under siege in Martin Place in the central business district of Sydney, Australia, Dec. 15, 2014.
Rob Griffith/AP Photo

Armed police are seen outside a cafe in the central business district of Sydney on Dec. 15, 2014.
Peter Parks/AFP/Getty Images

A sniper sets up on Philip Street at Martin Place on Dec. 15, 2014 in Sydney, Australia.
Don Arnold/Getty Images

Armed police patrol the vicinity at Lindt Cafe, Martin Place on Dec. 15, 2014 in Sydney, Australia.
Don Arnold/Getty Images

Police officers chat on the scene of the siege at Lindt Cafe in Martin Place on Dec. 15, 2014 in Sydney, Australia.
Daniel Munoz/Fairfax Media via Getty Images

Girls rush through Philip Street past armed police at a cafe on Dec. 15, 2014 in Sydney, Australia.
Don Arnold/Getty Images

Police officers chat on the scene of the siege at Lindt Cafe in Martin Place on Dec. 15, 2014 in Sydney, Australia.
Don Arnold/Getty Images

Armed police are seen outside a cafe in the central business district of Sydney on Dec. 15, 2014.
Peter Parks/AFP/Getty Images