'It was him': Day 1 of the Boston Marathon bombing trial

Tsarnaev’s defense attorney admits he participated in terror attack

The trial of alleged Boston Marathon bomber Dzhokhar Tsarnaev began Wednesday, nearly two years after two bombs exploded near the finish line, killing three people and injuring almost 300 others in the most high-profile case of terrorism on U.S. soil since the 9/11 attacks. Yahoo News' Holly Bailey was in the courtroom in Boston covering the proceedings. Catch up on the latest developments below.