Julie Walker

The provided news articles focus on Lindsey Vonn's ski accident and the search for Savannah Guthrie's missing mother, Nancy Guthrie. Neither article mentions anyone named Julie Walker. Therefore, it's impossible to provide any information about Julie Walker based on the given context. The articles are newsworthy due to Lindsey Vonn's prominent status in skiing and the concerning disappearance of Savannah Guthrie's mother. The search for Nancy Guthrie is ongoing, and Lindsey Vonn is recovering from her fall.