Huge ‘8647’ etched into grass on the National Mall, aerial images show – CNN

Huge ‘8647’ etched into grass on the National Mall, aerial images show CNN
Giant ‘8647′ numbers traced into ground on National Mall NBC4 Washington
Markings that appear to show the numbers “86 47” seen on National Mall in Washington CBS News
Someone is marking a huge ‘8647’ into the grounds of the National Mall in Washington Reuters
US authorities investigate huge etching of ‘8647’ on National Mall grounds The Guardian