Article Photos: Oklahoma Sen. Tom Coburn's new book warns of nation's 'Debt Bomb'

President Barack Obama greets Sen. Tom Coburn, R-Okla., on Capitol Hill in Washington, Tuesday, Jan. 25, 2011, before the president delivered his State of the Union address. (AP Photo/Evan Vucci) ORG XMIT: CAP144

President Barack Obama greets Sen. Tom Coburn, R-Okla., on Capitol Hill in Washington, Tuesday, Jan. 25, 2011, before the president delivered his State of the Union address. (AP Photo/Evan Vucci) ORG XMIT: CAP144