Russia and Turkey have been at odds for a while
There was already a lot of tension building between Russia and Turkey before the latter shot down a Russian jet.
11 killed in Tunisian bus explosion
A bus carrying security forces in Tunisia's capital was targeted in an explosion Tuesday.
US issues worldwide travel alert
The State Department has issued a worldwide travel alert during the biggest travel season of the year due to "increased terrorist threats."
Turkish forces shoot down Russian fighter jet
Turkish forces shot down a Russian fighter jet Tuesday. Questions about whether the pilots had entered Turkish airspace still surround the incident.