Telecom spying devices found near White House, other DC-area sites, DHS official says
"Sophisticated surveillance devices that intercepted cellphone calls near the White House and other “sensitive facilities” around Washington, D.C., were discovered in an 11-month federal study last year, a federal official wrote in a May letter. The letter detailed a trial program that used a series of cellular network sensors to discover the use of International Mobile Subscriber Identity (IMSI) catchers, Ars Technica reported."
http://www.foxnews.com/politics/2018/06/02/telecom-spying-devices-found-near-white-house-other-dc-area-sites-dhs-official-says.html