Friday morning, the day after the deadly attack on police officers in downtown Dallas, The United Way turned Dallas City Hall into a place to host a blood drive.
The blood drive was scheduled before Thursday night's shootings, but NBC 5 was told there were more people than usual
Police officers joined citizens giving blood, and one officer said it was comforting to see the support there.
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One woman who usually goes to give blood said she hugged the first officer she saw.
"I was very emotional when I got here and the first policeman I saw, I start crying and telling him how sorry I am for what's happening," said Dallas resident Yeda Migiliaccio.