U.S. President Barack Obama's White House welcome British Prime Minister David Cameron talks theme, from the civil war in Syria to prepare for the upcoming world's leading industrial nations summit in Northern Ireland.
Monday's meeting, Iran, the Middle East peace process, counter-terrorism and trade are other possible topics.
United States and Russia agreed last week to arrange an international conference, on behalf of the Government of Syrian President Bashar al-Assad and the opposition negotiations table. No dates yet, but such talks will focus on the establishment of a transitional government.
Cameron said after a meeting last week with Russian President Vladimir Putin, they all agreed, saying: "We must help facilitate this process."
The British leader also said that the United Kingdom, the United States, Russia and other countries should be taken to establish a transitional government.
In addition, last week, the Obama administration announced new aid will provide $ 100 million in Syria, strict Syrian refugees with humanitarian relief, rather than with the armed rebels seeking to overthrow the Assad from power on any possible decision.
Total U.S. humanitarian assistance in the war, now in its third year, will be over 500 million U.S. dollars.
The Obama administration has said it is considering the opposition armed weapons approving authorities, other military options, the recent disclosure of U.S. intelligence assessment, it is recommended that the Assad regime used chemical weapons.
Obama said the use of such weapons would cross a "red line".
President and Cameron will also review the priorities of the Group of Eight summit. Cameron will chair the Erne, Northern Ireland, June 17-18, gathered at the White House said on Friday that Obama will stop in Belfast, the capital of Northern Ireland, before attending the summit.
The visit will be Obama for the first time in Northern Ireland.
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