Washington, D.C., September 25, 2015 â?? The 57th Washington International Horse Show (WIHS) is pleased to extend invitations to media for accreditation for its annual competition taking place October 20-25, 2015, at Verizon Center in Washington, D.C. To apply for media accreditation, please go to http://www.wihs.org/media-credentials/ and complete the form.