Nominally part of the Back the Bid program for Chicago 2016, the Chicago Symphony’s offer of three free downloads also makes for a thoughtful 9/11 memorial. From this page, you can download recordings of the CSO playing The Star-Spangled Banner and Stars & Stripes Forever, as well as the Olympic Anthem. The first two are led by Sir Georg Solti and pack a mighty, terrorist-and-Nazi-and-Commie-defying wallop; the third is from concerts led by Leonard Slatkin.
The downloads will only be up through Sunday, so act now. And for those who care about such things, they’re at a high-quality 320kbps bit rate.