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Italy Earthquake

People take to the street after an earthquake hit the island of Ischia, near Naples, Southern Italy, Monday, Aug. 21, 2017. A 3.6-magnitude earthquake has rattled the Italian resort island of Ischia, damaging some buildings, cutting electricity and sending panicked residents and tourists into the streets. (Serenella Mattera/ANSA via AP)

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Italy Earthquake

People remove debris after an earthquake hit Ischia island, near Naples, Southern Italy, Monday, Aug. 21, 2017. (Serenella Mattera/ANSA via AP)

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Italy Earthquake

This image taken from video Monday, Aug. 21, 2017, shows people are helped out of damaged structures following an earthquake in Casamicciola on the Italian resort island of Ischia. An earthquake rattled the island at the peak of tourist season Monday night. (@precy80 via AP)

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Italy Earthquake

This image taken from video Monday, Aug. 21, 2017, shows collapsed structures following an earthquake in Casamicciola on the Italian resort island of Ischia. An earthquake rattled the island at the peak of tourist season Monday night. (@percy80 via AP)

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Italy Earthquake

This Monday, Aug. 21, 2017 photo, shows people standing near a collapsed building following an earthquake in Casamicciola on the Italian resort island of Ischia. An earthquake rattled the island at the peak of tourist season Monday night. (@percy80 via AP)

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Italy Earthquake

This Monday, Aug. 21, 2017 photo shows a car amid debris following an earthquake in Casamicciola on the Italian resort island of Ischia. An earthquake rattled the island at the peak of tourist season Monday night. (@percy80 via AP)

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Italy Earthquake

This handout picture provided by Italian Carabinieri police shows rescuers at work among damaged houses in the island of Ischia, southern Italy, Tuesday, August 22, 2017. An earthquake rattled the Italian resort island of Ischia at the peak of tourist season Monday night, killing at least one person and trapping a half dozen others, including children, under collapsed homes. Italy's national vulcanology agency put the initial magnitude at 3.6, though it revised it to a 4.0 sustained magnitude with a shallow depth of 5 kilometers (3 miles) in the waters just off the island. (Italian Carabinieri, HO/ANSA via AP)

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Italy Earthquake

People disembark in the harbor of Pozzuoli, part of the Metropolitan City of Naples, southern Italy, early Tuesday, August 22, 2017, after an earthquake hit the island of Ischia, off the Neapolitan coast on Monday. A 3.6-magnitude earthquake has rattled the Italian resort island of Ischia, damaging some buildings, cutting electricity and sending panicked residents and tourists into the streets. (Cesare Abate/ANSA via AP)

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Italy Earthquake

People disembark in the harbor of Pozzuoli, part of the Metropolitan City of Naples, southern Italy, early Tuesday, August 22, 2017, after an earthquake hit the island of Ischia, off the Neapolitan coast on Monday. A 4.0-magnitude earthquake has rattled the Italian resort island of Ischia, damaging some buildings, cutting electricity and sending panicked residents and tourists into the streets. (Cesare Abate/ANSA via AP)

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Italy Earthquake

People disembark in the harbor of Pozzuoli, part of the Metropolitan City of Naples, southern Italy, early Tuesday, August 22, 2017, after an earthquake hit the island of Ischia, off the Neapolitan coast on Monday. A 3.6-magnitude earthquake has rattled the Italian resort island of Ischia, damaging some buildings, cutting electricity and sending panicked residents and tourists into the streets. (Cesare Abate/ANSA via AP)

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Italy Earthquake

Firefighters and rescuers pull out a boy, Mattias, from the collapsed building in Casamicciola, on the island of Ischia, near Naples, Italy, a day after a 4.0-magnitude quake hit the Italian resort island, Tuesday, Aug. 22, 2017.(Italian Carabinieri, HO/ANSA via AP)

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Italy Earthquake

Rescuers pull out 7-month boy Pasquale from the rubble of a collapsed building in Casamicciola, on the island of Ischia, near Naples, Italy, a day after a 4.0-magnitude quake hit the Italian resort island, Tuesday, Aug. 22, 2017.Hospital officials on the Italian resort island of Ischia say that three brothers rescued from the rubble of their home after a 4.0-magnitude quake are all in good condition. (ANSA via AP)

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Italy Earthquake

11-year-old Ciro is carried on a stretcher after being rescued from the rubble of a collapsed building in Casamicciola, on the island of Ischia, near Naples, Italy, a day after a 4.0-magnitude quake hit the Italian resort island, Tuesday, Aug. 22, 2017. Hospital officials on the Italian resort island of Ischia say that three brothers rescued from the rubble of their home after a 4.0-magnitude quake are all in good condition. (ANSA via AP)

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Italy Earthquake

8-year-old Mattias is carried on a stretcher after being rescued from the rubble of a collapsed building in Casamicciola, on the island of Ischia, near Naples, Italy, a day after a 4.0-magnitude quake hit the Italian resort island, Tuesday, Aug. 22, 2017. Hospital officials on the Italian resort island of Ischia say that three brothers rescued from the rubble of their home after a 4.0-magnitude quake are all in good condition. (ANSA via AP)