Mass protests this year in Algeria, which holds a presidential election on Thursday, have caused the biggest political crisis since the end of its 1990s civil war that killed 200,000 people. Here is a timeline of the main events.February Tens of thousands of protesters take to the streets when it becomes clear veteran president Abdelaziz Bouteflika, then 81, will run again for president. Algerians protest president?s bid for...