Exhibit 99 TCM GROUP AGREEMENT THIS TCM GROUP AGREEMENT (the "Agreement") is made this 7th day of July, 1999, by and among Telcom-XM Investors, L.L.C., a Delaware limited liability company ("Telcom"), Columbia XM Radio Partners, LLC, a Virginia...TCM Group Agreement • October 18th, 1999 • Columbia Xm Radio Partners LLC • New York
