Lebanon marks the second anniversary on Thursday of the Beirut port explosion that killed 215 people and is widely seen as a symbol of corruption and bad governance by the sectarian ruling elite. Here are some of the main crises over the past two decades in a country that has known little stability since the end of its 1975-90 civil war: 2005 Former premier Rafik al-Hariri is killed and 21 others die in a bomb attack on his motorcade in Beirut on Feb. 14.