Original sentence: Churchhill is a Viet Nam war veteran and is of mixed White and Native American ethnicity.Churchill (born October 2, 1947) , an American academic, is a tenured professor of ethnic studies at University of Colorado at Boulder and co-chairman of the American Indian Movement of Colorado (Colorado AIM).In 2005, Churchill became the subject of intense right-wing propaganda campaign and debate in the United States because of an essay he wrote in 2001 about September 11, 2001 attacks.In some of his published work he characterizes the United States as an imperialist power with a history of genocide.Professor Churchill's specialization has centered on Native American issues, but he has also written on subjects such as the FBI and police states
Edited sentence: Churchill (born October 2, 1947) is an American academic and activist of mixed white and Native American heritage.He is very vocal on Native American issues, the FBI and police states.His published work characterizes the United States as an imperialist power with a history of genocide.In 2005, Churchill became the subject of intense debate in the United States because of an essay he wrote about September 11, 2001 attacks.The author of many books and articles, he is a tenured professor of ethnic studies at University of Colorado at Boulder and co-chairman of the American Indian Movement of Colorado (Colorado AIM)