North Korea displayed what appeared to be new long-range and submarine-launched missiles Saturday as part of a massive military parade in Pyongyang to mark the 105th anniversary of the nuclear-armed country's founder.

The main focus of the festivities, which celebrated the birth of Kim Il Sung, grandfather of current leader Kim Jong Un, was the North's growing missile arsenal and its improving capabilities.

The celebrations came amid soaring tensions with the U.S., which has diverted an aircraft carrier strike group to waters off the Korean Peninsula in a show of force designed to send a message to Pyongyang.