OTTAWA, Ontario (AP) — Gun retailers in Canada would be required to keep records of firearms inventory and sales for at least 20 years under government legislation introduced Tuesday by Prime Minister Justin Trudeau's government. The proposed bill would also expand the scope of background checks for those who want to acquire a gun.Personal history questions on a license application, for example, would cover a person's entire lifetime instead of five years. Public Safety Minister Ralph Goodale said Tuesday crimes involving firearms have become more prevalent despite an overall decline in crime rates in Canada over the last two decades.