The US Army had launched a second JLENS aerostat in Aug 2015 to increase cruise missile early warning coverage of the East Coast, joining one first launched in December 2014. However in Oct 2015, one of them got untethered from its base at Aberdeen Proving Ground, a U.S. Army facility 40 miles (65 km) northeast of Baltimore and wreaked havoc as it floated from Maryland into Pennsylvania while dragging more than a mile of cable and knocking out power to thousands.

