How can Lebanon balance its security needs while addressing the influence of groups like Hezbollah?

Secretary of State Marco Rubio pressed Lebanon President Joseph Aoun not to return to Hezbollah a truck full of explosives it attempted to smuggle into Beirut several days ago, according to a State Department official and another source with knowledge of the call. Why it matters: The issue is a test case for the Lebanese government's resolve to stand up to Hezbollah and implement its policy of keeping weapons outside the control of state security forces. Driving the news: Lebanese security forces intercepted the truck last week at a checkpoint on the highway connecting the Bekaa Valley to Beirut. The truck was carrying approximately 780 kilograms of explosives, including TNT and C-4, Lebanese officials said. Two suspects were arrested for transporting the shipment. After the arrest, Hezbollah acknowledged that the explosives belonged to them but claimed they were intended for use against the Israeli military in southern Lebanon. Hezbollah's opponents in Lebanon seized on the incident as further proof of the danger of the Shia militia's weapons and its independent military activity. Hezbollah and its allies in Lebanon have since pressed the government to release its two members and return the explosives to the militia. Behind the scenes: The State Department official said Rubio urged Aoun to "hold accountable all those who ordered, financed, and directed the shipment, and underscored that returning explosives to Hezbollah should be out of the question." Aoun assured Rubio that the Lebanese army and security forces are fully implementing decisions to prevent armed displays, confiscate weapons and ammunition, and combat smuggling, the president's office said. Aoun also stressed that the judicial authorities will show no leniency toward those responsible and will enforce the laws without favoritism."No one will be released unless he is innocent," Aoun told Rubio according to a Lebanese official. The big picture: Rubio also raised Lebanon's 1955 Boycott Law, which bans a