Obama, who is in South Korea to attend a two-day nuclear security summit that begins on Monday (March 26), visited the demilitarized zone dividing North Korea and South Korea. US President flew to the area by helicopter. He spoke to the US soldiers stationed there as well as South Korean soldiers. Later, he gazed at the North Korean territories by binoculars and behind a bulletproof pane of glass. After spending about ten minutes at the demilitarized zone, Obama left for the South Korean capital of Seoul for a meeting with President Lee Myung-bak. Obama's visit to the peninsula comes at a time of rising tensions between south and north over North Korea's announcement of plans to launch a satellite that the United States believe is intended as a test firing of a missile. Washington warned that the launch might deal a blow to a recent agreement between Washington and Pyongyang for US food aid to North Korea.