Click here to see 20 of the first tweets. Also, click the photo gallery above to see more tweets from celebrities with memories and thoughts on the "Fast & Furious" actor's untimely death.
Walker was a passenger in his friend's car before the accident, and he was attending an event for his charitable organization Reach Out Worldwide. According to the website, the organization's team is a network of committed professionals with first responder skills (including project management, logistics, heavy equipment operation, EMT, paramedic, firefighting, and healthcare, etc.) to help fight against catastrophic results like that of Hurricane Katrina.
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