After an Azerbaijan Airlines jet crashed in Kazakhstan, speculation mounted about why the plane went down and whether possible Russian air defense action may have played a role.

An Azerbaijan Airlines plane flying from Baku to Grozny that crashed near the city of Aktau in Kazakhstan was shot down by a Russian Pantsir-S air defence system. Source: Reuters, citing its sources Quote: "One of the Azerbaijani sources familiar with Azerbaijan's investigation into the crash told Reuters that preliminary results showed the plane

A day after an Azerbaijani airliner's crashed in Kazakhstan, aviation experts say the plane most likely went down after being hit by Russian air defense systems. Here are some things to know about the crash that killed 38 out of the 67 people on board ...