Russia's prime minister is promising payback for the terrorists who attacked the country's largest airport.
New video shows the moment a suicide bomber launched the deadly attack. A security camera caught the terrifying moment.
Witnesses say the bomber screamed "I will kill you all" before blowing himself up. At least 35 people were killed and more than 180 injured.
Prime Minister Vladimir Putin promises revenge, saying "retribution is inevitable".
No one is claiming responsibility for the blast, but investigators say it looks like the work of Islamic militants. Russian officials blame each other for the security lapse that let the bomber slip in unchecked.