- Workersusedchiselsandhi-techlasertechnologytoscrubgrimefromthemorethan24,000blocksofstonethatmakeupthe183ft(55.8m)talltower.Theroughcarvingismadefollowingthatoutlinebeforethefinalcarvingisexecuted,forwhichthecarvermayuseupto100differentchisels.Asafet...
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