Complex sentence: He has appeared on many television and radio networks throughout the world, including CNN, CBS, NPR, the BBC and, Al Jazeera, and during the weeks leading up to the 2003 invasion of Iraq, was a regular guest on the Oprah Winfrey show.
Split into simpler sentences: He has appeared on many television and radio networks throughout the world, including CNN, CBS, NPR, the BBC and, Al Jazeera. During the weeks leading up to the 2003 invasion of Iraq, he a regular guest on the Oprah Winfrey show.