In their joint op-ed article in Thursday’s edition of The Times of London, the two leaders also promised that extremists would not muzzle freedom of speech, referring to the recent attack on French satirical newspaper Charlie Hebdo.
"Whether we are facing lone fanatics or terrorist organizations such as Al-Qaeda, Islamic State or Boko Haram, we will not be cowed by extremists. We will defeat these barbaric killers and their distorted ideology," Reuters quotes the article as saying.
Their article also promotes US-British alliances over the decades and the nations’ shared commitment to economic growth, scientific discovery and national defense, according to the Associated Press.
The op-ed comes ahead of a two-day visit of the British prime minister to Washington.
The leaders are scheduled to have a working dinner on Thursday night at the White House. They will have more talks on Friday.
The UK Prime Minister is also set to seek cooperation with US President Barack Obama to pressure American Internet companies to share data in the expectation of tracking down Islamist extremists online, the Guardian said Thursday, citing unnamed government sources.
On Monday, Cameron stated that the UK government intelligence agencies should be able to read every form of communication. The prime minister also urged Twitter and Facebook to cooperate with an eavesdropping center of the UK Government Communications Headquarters (GCHQ). Cameron’s comments came in the wake of a series of gun massacres in Paris last week.
Earlier this week, Obama’s proposed legislation to improve cybersecurity and enhance consumer privacy. The plan was announced following multiple cyberattacks in the United States in 2014, including a hack on Sony Entertainment alleged to be a response to the Christmas day release of the controversial movie The Interview.