ROK, US carry out joint landing drill Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shor...

ROK, US carry out joint landing drill

Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

A ROK marine takes part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

A ROK marine (2nd L) and soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012. [Photo/Agencies]

Soldiers from the US Marine Corps take part in a US-ROK joint landing operation drill along the shore in Pohang, about 370 km (230 miles) southeast of Seoul, March 29, 2012.

(Agencies)