Russia invades Ukraine: Russia fires missiles, forces enter combat
Explosions rocked the breakaway eastern Ukrainian city of Donetsk as Russian troops mobilize.
A tank drives along a street after Russian President Vladimir Putin ordered the deployment of Russian troops to two breakaway regions in eastern Ukraine following the recognition of their independence, in the separatist-controlled city of Donetsk, Ukraine(photo credit: REUTERS/ALEXANDER ERMOCHENKO)ByREUTERSUpdated: