Seoul Metro employee, right, assists a civil servant performing the role of a civilian during an anti-terror drill on the sidelines of the Ulchi...
Seoul Metro employees carry a stretcher during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Civil servants playing the role of civilians lie on the ground next to a suitcase during an anti-terror drill on the sidelines of the Ulchi Freedom...
People walk past police officers wearing gas masks during a simulated chemical terrorism crisis as part of an anti-terror drill on the sidelines of...
Soldier kneels in front of a jewelry store during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Bystander looks on as police officers wearing gas masks take part in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Soldier stands guard during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul,...
Soldier kneels in front of a clothing store during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Bystander takes a photograph of police officers wearing gas masks during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Soldiers wearing gas masks perform inspections inside a subway train during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian...
Police officers wearing gas masks take part in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Police officers patrol with a security dog during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Firefighters spray their hose during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in...
Soldiers wearing gas masks perform inspections inside a subway train during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian...
Police officers wearing gas masks aim their weapons during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at...
Soldiers wearing gas masks perform inspections inside a subway train during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian...
Police officers participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul,...
Police officer wearing a gas mask aims his weapon during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a...
Passenger walks past police officers wearing gas masks during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises...
Police officers wearing gas masks participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Police officers, left, and soldiers wearing gas masks participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Passengers walk past police officers wearing gas masks during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises...
Police officers wearing gas masks participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Civil servants performing the role of civilians wear gas masks during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Soldier wearing a mask is assisted during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station...
Firefighters wear protective clothing during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Passenger takes a photograph of police officers wearing gas masks during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Woman walks past soldiers standing at an elevator during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a...
Passenger runs past soldiers standing guard during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Firefighters carry a stretcher along a platform during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a...
Police officers stand guard in front of a Nature Republic cosmetics store during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian...
Police officers stand guard beyond soldiers during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Soldiers participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul, South...
Police officers wearing gas masks participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway...
Soldier stands guard during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul,...
Soldiers participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul, South...
Soldiers participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul, South...
Civil servants playing the role of civilians lie on the ground next to a suitcase during an anti-terror drill on the sidelines of the Ulchi Freedom...
Bystander looks at his smartphone as soldiers stand guard during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Soldiers stand guard during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul,...
People walk past police officers wearing gas masks during a simulated chemical terrorism crisis as part of an anti-terror drill on the sidelines of...
Soldiers participate in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military exercises at a subway station in Seoul, South...
Bystander takes a photograph of police officers wearing gas masks during an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...
Bystander looks on as police officers wearing gas masks take part in an anti-terror drill on the sidelines of the Ulchi Freedom Guardian military...