In the Beirut cemetery where martyrs of Hezbollah are buried, new graves are appearing more frequently. It's unclear where the men were killed, but members of Syria's opposition accuse the militant group, allied with Iran, of sending fighters into Syria to aid the Bashar Assad regime. It's an accusation that Hezbollah denies. One Shiite analyst says Hezbollah members have been disappearing since last year and families have been instructed not to speak about it.