Massive '8647' etching on the National Mall triggers vandalism probe

TL;DR
US Park Police are investigating a large, unclear etching of '8647' into the West Lawn of the Washington Monument on the National Mall; the cause is unknown, grass samples have been collected, and officials describe the act as vandalism and promise accountability as the investigation continues.
Topics:top-newsnational#investigation#national#national-mall#us-park-police#vandalism#washington-monument
- US authorities investigate huge etching of ‘8647’ on National Mall grounds The Guardian
- Huge ‘8647’ etched into grass on the National Mall, aerial images show CNN
- Markings that appear to show the numbers "86 47" seen on National Mall in Washington CBS News
- Enormous etchings of numbers interpreted as threat to Trump appear on National Mall The Washington Post
- Police investigate '8647' written in grass on US national mall BBC
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