Lebanon on Friday marks 20 years since former prime minister Rafik Hariri's assassination amid seismic political changes that have weakened Hezbollah and its backers and could herald a comeback for Hariri's son Saad.

Rafik Hariri, a towering political figure, had resigned as premier when a suicide bombing targeted his convoy in Beirut, killing him and 21 others on February 14, 2005.