Timeline: Boston Marathon bombings

POSTED: 9:30 AM PDT April 16, 2013    UPDATED: 1:08 PM PDT July 10, 2013 
Dzhokhar Tsarnaev

With Boston Marathon bombing suspect Dzhokhar Tsarnaev pleading not guilty Wednesday in his first court appearance since being arrested, revisit a timeline of the events in the case so far.