kmx.io/prism.js

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 	<div class="used-by-logos">
 		<a href="http://smashingmagazine.com" target="_blank"><img src="img/logo-smashing.png" alt="Smashing Magazine" /></a>
-		<a href="http://webplatform.org" target="_blank"><img src="img/logo-wpd.png" alt="WebPlatform.org" /></a>
+		<a href="https://playbook.cio.gov/designstandards/" target="_blank"><img src="img/logo-us-web-design-standards.png" alt="U.S. Web Design Standards" /></a>
 		<a href="http://alistapart.com" target="_blank"><img src="img/logo-ala.png" alt="A List Apart" /></a>
 
 		<a href="https://developer.mozilla.org/" target="_blank"><img src="img/logo-mdn.png" alt="Mozilla Developer Network (MDN)" /></a>