Disaster_Accident

MEMORIAL_12529

Prince Williams County motorcycle police officers arrive for a ceremony to unveil the name of slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Park Police officer Jerome Stoudamire [cq], right, watches as his fellow officers unravel flags before a ceremony to unveil the name of slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Park Police honor guard Sgt. Janice Bindeman [cq] carries the American flag in formation during a ceremony to unveil the name of slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Police officers stand in line during a ceremony to unveil the name of slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Officer Dale Yung becomes emotional during a ceremony to unveil the name of his brother, slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Family members of Prince William County Police Officer Chris Yung are escorted during a ceremony, to unveil the name of slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

MEMORIAL_12523

Patrick Yung, 2, stands next to his father, Officer Dale Yung, left, during a ceremony to unveil the name Dale's brother, slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Officer Dale Yung holds his young son in his hands during a ceremony to unveil the name of his brother, slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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Robin Young makes a rubbing of her slain husband, Prince William County Police Officer Chris Yung during a ceremony to unveil his name on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

MEMORIAL_12520

Robin Yung, center, is comforted by Prince William County Police Chief Steve Hudson, right, during a ceremony to unveil the name of her slain husband, Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. Also pictured is Yung's father, Edward Yung, left. (Andrew Harnik/The Washington Times)

MEMORIAL_12519

Prince William County Police Officer Dale Yung is comforted by his wife Nancy, left, during a ceremony to unveil the name of his brother, slain Prince William County Police Officer Chris Yung on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

MEMORIAL_12518

A Prince Williams County motorcycle police officer makes a rubbing of slain Prince William County Police Officer Chris Yung during a ceremony to unveil his name on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

MEMORIAL_12517

A Prince Williams County motorcycle police officer makes a rubbing of slain Prince William County Police Officer Chris Yung during a ceremony to unveil his name on the wall of the National Law Enforcement Memorial, Washington, D.C., Monday, April 29, 2013. Yung was killed in a motorcycle accident while responding to a separate car crash New Years Eve last year. (Andrew Harnik/The Washington Times)

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If an emergency hit the District, as it did Boston, "it would be almost impossible for many off-duty workers, who would be desperately needed, to respond in a timely manner," Mayor Vincent C. Gray wrote to D.C. Council Chairman Phil Mendelson. (The Washington Times)

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** FILE ** Bangladeshi relatives of missing workers in a building that collapsed Wednesday hold pictures of their family members in Savar, near Dhaka, Bangladesh, Sunday, April 28, 2013. (AP Photo/Kevin Frayer)

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A Boeing 787 "Dreamliner" aircraft belonging to Japan's All Nippon Airways takes off from Haneda Airport in Tokyo at the start of a test flight on Sunday, April 28, 2013. (AP Photo/Kyodo News)