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Chandra observations of massive star forming regions

I review selected results obtained using Chandra X-ray observations of high mass star forming regions. Discussed topics include diffuse X-ray emission; the mechanism of X-ray emission in stars from the highest to the lowest masses; the role of imaging X-ray observations in the identification of star forming region members and the implications for star formation studies. Special attention will be given to results recently obtained for the Orion Nebula Cluster by the Chandra Orion Ultradeep Project (COUP).