Pa. politician discusses how Pittsburgh bridge collapse is affecting the community

State Rep. Dan Frankel praises the rescue efforts and discusses the upcoming investigation after 10 people were injured in a bridge collapse in Pittsburgh.

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At least 17 killed in mass shootings in US over the weekend.

At least 17 killed in mass shootings in US over the weekend.

The shootings took place in various cities over the weekend.

What we know about the alleged gunman in the Buffalo shooting.

What we know about the alleged gunman in the Buffalo shooting.

Payton S. Gendron appears to have been motivated by hate, law enforcement said.

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ABC News Live: Biden, first lady to travel to Buffalo following mass shooting.

ABC News Live: Biden, first lady to travel to Buffalo following mass shooting.

Plus, Ukrainian forces say they have pushed Russian troops out of the Kharkiv region, and families across the country struggle to find baby formula.

1 million lives lost to COVID-19

1 million lives lost to COVID-19

Dr. Paul Offit, director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, discusses how science gave the world its best weapon against COVID.

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Buffalo supermarket suspect charged with 1st degree murder, pleads not guilty.

Buffalo supermarket suspect charged with 1st degree murder, pleads not guilty.

Criminal defense attorney Bernarda Villalona discusses the U.S. Justice Department's investigation into the Buffalo mass shooting as a “hate crime and an act of racially motivated violent extremism.”