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.

Thirty-eight of 67 onboard flight from Baku to the Chechen city Grozny believed to have been killed. Russian authorities cite bird strike.

Here are some things to know about the crash that killed 38 out of the 67 ... It crashed while making an attempt to land in Aktau, Kazakhstan, after flying east across the Caspian Sea. The plane went down near the coast about 3 kilometers (2 miles) from ...