President Barack Obama says extremists have exploited tensions among Muslims. Mr. Obama on Thursday said that some people in the United States view Islam as hostile to Western countries. Mr. Obama says that's not the case, despite fear and mistrust. Mr. Obama is in Cairo delivering a much-awaited speech to repair the United States' relationship with Muslim countries. Mr. Obama says fear and mistrust is not fair. Mr. Obama says the United States' relationship with Muslims and their countires should improve. He says such suspicion and distrust must end.