Lebanon's parliament extended on Friday by one-year the term of army commander Joseph Aoun, avoiding a vacuum in leadership in an institution seen as vital to keeping peace inside the country amid crises that include a border conflict with Israel. Parliament approved the extension as hostilities raged on the frontier between the Lebanese Shi'ite group Hezbollah and Israel. Hezbollah, a political group and heavily armed militia, is widely seen as militarily more powerful than the army.