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It took four years for Google to address the "Google bomb" that was lobbed at former President Bush.

But it took the Internet behemoth only a few days to defuse the same attack on President Obama.

Four years versus a few days ... Some Googlers are asking why.

In 2003, President Bush's detractors successfully gamed the Google search engine by arranging to have countless Web sites link the words "miserable failure" to Bush's official biography on the White House Web site.

The result was that when someone typed the search term "miserable failure" into the Google search box, Bush's bio rose to the top of the search results.

And that's how it stayed until 2007, when Google developed an algorithm to detect what became known as "Google bombs" and re-directed the term "miserable failure" to non-political pages.

