Moscow is keeping the option of military force on the table amid ongoing negotiations.
Sep 19, 2014 | 04:00 GMT
Staying calm and focused can improve a person's chances of surviving an attack.
Sep 18, 2014 | 04:15 GMT
Although the media has given extensive coverage to possible jihadist sleeper cells, they are too complicated and expensive for groups like al Qaeda and the Islamic State to operate.
Sep 18, 2014 | 03:00 GMT