Ex-Calif. governor tweets son 'doing much better'

LOS ANGELES, CA Schwarzenegger tweeted his appreciation to well-wishers Monday night.

In his post, Schwarzenegger said "Thanks for all your support for Christopher. It means a lot to me & to him. He's doing much better & we'll have him back at full speed soon."

The 13-year-old son of Arnold Schwarzenegger and Maria Shriver suffered a collapsed lung and broken bones in the accident on July 17.

The couple are separated and in the midst of a divorce.

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