At least four people have been killed and six wounded in a suicide car bombing in Lebanon's Bekaa Valley. A local Hezbollah leader is among the dead. The Nusra Front in Lebanon is said to have claimed responsibility for the attack blaming Hezbollah for its support of President Bashar Al-Assad and its active role in the Syrian conflict. Al Jazeera talks to Rami Khouri, a Professor at the American University of Beirut.