Disaster_Accident

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Smoke rises from a fire burning in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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A firefighter sprays water onto a fire in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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A firefighter sprays water from a hose onto a fire in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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A firefighter sprays water from a hose onto a fire in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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Smoke rises from a fire in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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Smoke rises from a fire burning in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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Firefighters battle a fire burning in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. (AP Photo/Jeff Chiu)

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Residents at Mission Creek Senior Community building look from their roof at a fire burning in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)

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Smoke rises from a fire burning in San Francisco, Tuesday, March 11, 2014. The major fire burning in San Francisco's Mission Bay neighborhood sent an enormous plume of black smoke high into the sky. There were no initial reports of injuries. The four-alarm fire that began about 5 p.m. was ravaging a high-rise building under construction and moving down a block. Fire-suppression systems had not yet been installed in the building, making the battle against the blaze more difficult, Fire Department spokeswoman Mindy Talmadge said. (AP Photo/Jeff Chiu)