European countries not the only ones at risk.

This article talks about how European countries are at risk.
Additionally, the United States is also at high risk, especially as the 4th of July holiday weekend is approaching.
Enjoy the Celebration, be aware, and report suspicious persons, activities, and things. The responders would rather stop terrorism before it happens rather than have to respond to a Terrorist act.

http://www.dailymail.co.uk/travel/travel_news/article-3665531/Ataturk-International-Airport-reopens-wake-terrorist-attack-experts-call-rethink-security-aviation-hubs.html