Heading into two days of talks, US President George W. Bush and British Prime Minister Gordon Brown plan to swap strategies on how to reduce their military forces in Iraq and halt Iran's nuclear ambitions. The two leaders will also discuss Middle East peace, climate change, trade and Northern Ireland governance, Bush's national security adviser Stephen Hadley told reporters traveling with the president on Sunday. On the day Bush got to London, a British newspaper reported that the president, in an interview earlier in the week, had delivered a warning to Brown about additional reductions of British forces in Iraq. The Observer story said Bush's words amounted to a "stern message" to Brown. The White House quickly countered, insisting that Bush and Brown remain in accord about how Iraq.