Tsarnaev smiles at crying sisters as he enters court

Steve Cooper from Boston's 7 News, Fox News' Sharman Sacchetti and WCVB's Sean Kelly have tweeted:

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Boston suspect pleads not guilty

Survivors and relatives of the victims of the Boston Marathon bombing have heard the suspect Dzhokhar Tsarnaev plead not guilty to using a weapon of mass destruction and 29 other charges.