Clearly was meant to be a joke.
But it was a bad one....a VERY bad one. Terribly bad.
Oh...she was on company time when she pulled her little stunt. That makes it a fireable offense. Period.
From the article...
During a work trip to Arlington National Cemetery, Lindsey Stone, of Plymouth, squatted next to the Tomb of the Unknown Soldier, sticking up her middle finger and pretending to scream next to a sign that asked for “Silence & Respect.”