ເຈົ້າ​ໜ້າ​ທີ່ ສ​ຫລ ແລະ ອີ​ຢູ ເຕືອນ​ເຖິງ ໄພ​ຂົ່ມ​ຂູ່ ຂອງ ພວ​ກ​ກໍ່​ການ​ຮ້າຍ

German police officers patrol the airport terminal in Frankfurt, Germany, Jan. 19, 2015.

A Belgian soldier guards an entrance to the European Council headquarters in central Brussels, Belgium, Jan. 19, 2015.

Belgian soldiers patrol the EU headquarters in Brussels, Belgium, Jan. 19, 2015.

In the midst of heightened security, soldiers patrol the EU headquarters in Brussels, Belgium, Jan. 19, 2015.