But McCain, appearing on "The CBS Evening News with Katie Couric" Wednesday night, challenged Obama's claims that he supported a joint statement.

CNN: Was Obama blindsided by McCain announcement?

The Union of Concerned Scientists has already issued a statement debunking the book's claims, and debate about the merits of this one idea among many will rage on in the blogosphere.

ECONOMIST: The controversy over SuperFreakonomics

The FAI statement said that the newspaper's claims in relation to a "ticket fiasco are unfounded".

BBC: FAI rejects Aviva Stadium ticket crisis reports

In a statement the Environment Agency denied the campaign group's claims.

BBC: Hinkley Point C nuclear emissions 'underestimated'

"I hope that Margaret Beckett will make an early statement to Parliament about the gap between Labour's claims before the election that they were on the home straight on resolving the crisis and the continued outbreaks being confirmed in many areas, including some previously unaffected, " he said.

BBC: Fresh disease outbreak in National Park