From Aberdeen Proving Ground:
ABERDEEN PROVING GROUND, Md.— Personnel are responding to a tether break at the Joint Land Attack Cruise Missile Defense Netted Sensor System (JLENS) location on the Edgewood side of APG. The aerostat moored at Edgewood broke free at around 11:54 a.m.; approximately 6,700 feet of tether are attached. Emergency personnel are tracking the aerostat which is still aloft in moving toward Pennsylvania.
Anyone who sees the aerostat is advised to contact 911 immediately; people are warned to keep a safe distance from the airship and tether as contact with them may present significant danger.
Can the tether break?
The chance of that happening is very small because the tether is made of Vectran and
has withstood storms in excess of 100 knots. However, in the unlikely event it does happen, there are a number of procedures and systems in place which are designed to bring the aerostat down in a safe manner.