Lebanese Prime Minister Saad al-Hariri will visit Damascus today for landmark talks with Syrian President Bashar al-Assad.
The visit will be the new prime minister's first to Syria and looks set to close the chapter on nearly five years of animosity between Damascus and a broad political alliance led by Mr Hariri.
Lebanese political sources expect the two leaders to agree on opening a new page in their personal relationship and on strengthening cooperation between their governments to guarantee Lebanon's stability.
Mr Hariri's "March 14th" alliance accused Syria of assassinating his father, statesman Rafik al-Hariri, in February 2005. They also blamed Damascus for attacking and killing other politicians and journalists.
Syria denies the allegations. A special court based in The Hague has yet to indict anyone for the killing.
Outrage in Lebanon over the assassination and international pressure forced Syria to withdraw its troops from Lebanon in April 2005, ending three decades of military presence in its smaller neighbour.
Saad al-Hariri's coalition has often clashed in the past with Syria's allies in Lebanon, led by the powerful Iranian-backed group Hezbollah, and the political crisis has threatened to plunge Lebanon into a new civil war.
Rapprochement between Syria and Saudi Arabia, which backs Mr Hariri, earlier this year eased tension and allowed him to form a unity government that includes Hezbollah and other Damascus allies.
Reuters