...0x00]]><...

SELECT
	1 as Tag,
	null as Parent,
	[NewsTitle],
	[NewsSummary],
	LEFT(DATENAME(dw, [NewsDate]),3) + ', ' + STUFF(CONVERT(nvarchar,[NewsDate],113),21,4,' GMT')
FROM [sd_News] WHERE [IDChannel] = '11'

SELECT
	1 as Tag,
	null as Parent,
	[NewsTitle] as [item!1!title!ELEMENT], 
	[NewsSummary] as [item!1!description!CDATA],
	LEFT(DATENAME(dw, [NewsDate]),3) + ', ' + STUFF(CONVERT(nvarchar,[NewsDate],113),21,4,' GMT') as [item!1!pubDate!ELEMENT]
	FROM [sd_News] WHERE [IDChannel] = '11' 

FOR XML EXPLICIT