Lebanon’s army has been put on high alert after former Prime Minister Rafik Hariri was killed in a massive bomb explosion Monday. At least 14 other people were killed and 135 wounded in the blast. It marked the bloodiest attack in Lebanon since the end of the civil war. It is still unclear who is responsible for the bombing. A little-known group calling itself Victory and Jihad in Greater Syria issued a statement saying it carried out the bombing because of Hariri’s ties to the Saudi Royal family. But the claim has not been verified. Opposition leaders in Lebanon said Syria bore a measure of responsibility. The Syrian government has denied any involvement. We’ll have more on this in a few minutes.