By Rich McKay ATLANTA (Reuters) -Americans protesting anti-Asian violence gathered in Atlanta and other U.S. cities on Wednesday to mark one year since a mass shooting of women of Asian heritage in Atlanta-area spas awoke the nation to the spike in hate incidents against the community. Advocates organized events in a dozen cities including Houston, Detroit, and San Francisco, to raise awareness over the growing risk of violence, accentuated in recent days by the brutal beating of a woman of Asian heritage in New York. About 200 people assembled inside a freight depot on a rainy afternoon in At…