The US believes several State Department employees at the US embassy in Havana were subjected to an "acoustic attack" using sonic devices that left at least two with such serious health problems they needed to be brought back to the US for treatment, several senior State Department officials told CNN.
원문출처 : http://www.cnn.com/2017/08/09/politics/us-cuba-acoustic-attack-embassy/index.html
원문출처 : http://www.cnn.com/2017/08/09/politics/us-cuba-acoustic-attack-embassy/index.html