Claire Squires's Death at London Marathon

This is sad.

At Telegraph UK, "London Marathon 2012: thousands donated to charity after Claire Squires's death."

And from London's Daily Mail, "Marathon death girl was running in memory of her brother: Charity donations rocket past £200,000 for Samaritans."

She was only 30 years old. The cause of death is unknown but it's possible she had an undiagnosed heart condition.