This went under the radar a bit.
“As part of the State Department’s continuous efforts to provide Americans travelling abroad with information about relevant events, we are alerting U.S. citizens to the risk of potential terrorist attacks throughout Europe, targeting major events, tourist sites, restaurants, commercial centers and transportation. The large number of tourists visiting Europe in the summer months will present greater targets for terrorists planning attacks in public locations, especially at large events. This Travel Alert expires August 31, 2016.”
“European authorities continue to take steps to assure public safety and disrupt terrorist plots. We work closely with our allies and will continue to share information with our European partners that will help identify and counter terrorist threats. ”
https://travel.state.gov/content/passports/en/alertswarnings/europe-travel-alert.html