Cameron was particularly emphatic on Libya, saying strongman Moammar Gadhafi must go.
"The president and I are agreed we will stand with those who work for freedom," Cameron said. "This is the message we'll take to the (Group of Eight summit) tomorrow (in France) when we push for a major program of economic and political support for those countries seeking reform. And this is why we mobilized the international community to protect the Libyan people from Col. Gadhafi's regime, why we'll continue to enforce U.N. resolutions with our allies, and why we restate our position once more: It is impossible to imagine a future for Libya with Gadhafi still in power. He must go."
Obama and first lady Michelle Obama spent the night at Buckingham Palace before Obama and Cameron's the joint news conference at Lancaster House in London.
The president emphasized the burden of security in Afghanistan will be passed to the Afghans. "We reviewed our progress in Afghanistan," Obama said, "where our brave servicemen and women have fought side by side to break the Taliban's momentum and where we are preparing to turn a corner. We reaffirmed the importance of beginning the transition to Afghan lead for security this year and completing that transition by 2014."
Cameron lauded the U.S. raid that killed al-Qaida founder Osama bin Laden in Pakistan earlier this month, and despite some U.S. reservations about Pakistani security forces, said the West must continue to work with the Pakistani government.
"In this vital effort (against terror), we must continue to work with Pakistan," Cameron said. "People are asking about our relationship, so we need to be clear. Pakistan has suffered more from terrorism than any country in the world. Their enemy is our enemy. So, far from walking away, we've got to work even more closely with them."
The Obamas gave Cameron a custom-made pair of White House Magnolia wood and sterling silver cufflinks engraved on the reverse with the President's signature, and a first edition of President John F. Kennedy's book, "Profiles in Courage."
Mrs. Cameron received a custom-designed sterling silver cuff bracelet adorned with a White House Magnolia wood cabochon center.
The Camerons' children were given a signed, personalized copy of Obama's book, "Of Thee I Sing." Nancy and Elwen also received scooters, and Florence received a handcrafted wooden jigsaw puzzle of Bo Obama, the first dog, and a stuffed animal of Bo.