U.S. President Barack Obama has arrived in Northern Ireland where he will attend a G8 summit likely to be dominated by the U.S. decision to arm Syrian rebels. The summit on Monday and Tuesday at an Irish resort will bring together leaders of the world's top economies. Mr. Obama meets Monday morning with British Prime Minister David Cameron ahead of the summit. The U.S. leader also plans to meet Monday with Russian President Vladimir Putin for talks on the Syrian conflict. The Russian leader has supported the government of embattled Syrian leader Bashar al-Assad. The White House also said Mr. Obama will speak about his continuing support for the U.S. National Security Agency's surveillance of telephone records of U.S. citizens and the monitoring of foreign nationals' use of the Internet. The G8 summit will also address efforts to boost the world's sluggish economies. The G8 countries account for 50 % of the world's economic output.