Peeping over North Korea

North Korean border guards rest on the banks of the Yalu River border with China, North Korean city of Hyesan April 4, 2009. (REUTERS / Reinhard Krause)

Men ride bikes along the shore of the Yalu River into North Korean city of Hyesan April 5, 2009. (REUTERS / Reinhard Krause)

Dusk gathered over the Yalu River that separates the North Korean city of Siniuju (on the opposite bank) on the Chinese city of Dandong. Not far from this there is a broken bridge, on which day-ride trucks, trains and other vehicles carrying goods. (Frederic J. BROWN / AFP / Getty Images)

A woman gathers water from the ice-covered Yalu River in the town of Hyesan. April 5, 2009. (REUTERS / Reinhard Krause (CHINA SOCIETY MILITARY POLITICS)

Layouts artillery shells from the rocks and branches on the bank of the Yalu River with the North Korean side, opposite the Chinese city of Hekou, on Tuesday, March 24, 2009. (AP Photo / Andy Wong)

North Korean soldiers patrolling the North Korean-Chinese border near Dandong April 5, 2009. (REUTERS / Nir Elias)

North Korean soldiers taking aim at the photographer from the shore of the Yalu River near the town of Sinychzhu, opposite the Chinese city of Dandong April 15, 2009. (REUTERS / Stringer)

North Korean border guard threatened a photographer from the shore of the Yalu River in Hyesan, North Korea, April 4, 2009. (REUTERS / Reinhard Krause)

North Korean border guards throw stones at the photographer on the bank of the Yalu River near the town of Hyesan April 6, 2009. (REUTERS / Reinhard Krause)

Workers smiling Chinese tourists, who they waving from the passenger boat. Shore of the Yalu River into North Korean city Sinychzhu, Sunday, March 22, 2009. They do not represent what happens online order flowers . (AP Photo / Andy Wong)

Soldiers at leisure play basketball on the bank of the Yalu River near the North Korean city Sinychzhu April 15, 2009. (REUTERS / Stringer)

North Korean boys throwing stones at passing by boat. April 3, 2009, near the Chinese city of Dandong. (Frederic J. BROWN / AFP / Getty Images)