Monument from a terrorist attack.
A recent report found the monument as being especially vulnerable to attack, according to The Washington Post. The circle of metal would replace the concrete barrier already in place.
The National Park Service is leaning toward a plan calling for the placement of 40-inch metal posts, 40 inches apart. The circle would be 150 feet from the corners of the monument.
The barrier would be the first of its kind for a national monument in Washington.
Congress provided $3.6 million dollars last year to fund a barrier designed to keep vehicles from approaching the monument.
The metal posts would replace reinforced concrete barriers that have circled the monument for the past two years while the structure was being restored.