The payment card networks continue to assure the public Wednesday that all is well. First Data, NYCE, TSYS, Concord EFS all confirmed there were no interruptions to their networks. VISA, MasterCard, American Express, and Discover also issued statements confirming that there was no problems on their networks. However all indicated that security has been beefed-up at all operations centers and that merchants may have difficulty processing card payments through phone lines. Of all the national payment card companies, American Express sustained the heaviest damage given its close proximity to the World Trade Center. AmEx officials are still assessing the damage and will announce shortly plans to re-open its executive offices in New York.