 I'm Walter M. Sterling, and coming up, I'm going to share with you my amazing history with Dr. Ruth Westheimer. Dr. Ruth Westheimer, who passed away this weekend. I'm Walter Sterling. This is Sterling on Sunday. The IRS is the most powerful collection agency on Earth. And if you owe back taxes, the news isn't good. The IRS has raised the interest rate it charges on unpaid taxes in recent years. This hits hard if you're behind on your taxes.