Looking back on the killing of Rafiq Hariri

The 2005 assassination of former Lebanese prime minister Rafiq Hariri unleashed a new wave of sectarian tensions in the country.

Six years later, those tensions are still very much present.

There has been widespread speculation about who was behind Hariri's murder but to this date, there is no concrete evidence.

Al Jazeera's Scott Heidler looks back on the killing, and what followed.