Dartmouth College computer science professor Hany Farid -- using funding from Microsoft Corp. -- has developed technology to help scrub extremist content from the internet.
Extremists: Their Words. Their Actions.
Fact:
On April 3, 2017, the day Vladimir Putin was due to visit the city, a suicide bombing was carried out in the St. Petersburg metro, killing 15 people and injuring 64. An al-Qaeda affiliate, Imam Shamil Battalion, claimed responsibility.
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