By Sue-Lin Wong PYONGYANG (Reuters) – Foreign journalists visiting North Korea gathered in Pyongyang for “a big and important event” on Thursday with tensions high over the possibility of a new weapons test by the isolated state and as a U.S. carrier group sails towards the Korean peninsula. North Korea marks the 105th anniversary of the birth of the state founder Kim Il Sung on Saturday and in 2012 launched a long-range rocket carrying a satellite to mark the date. Around 200 foreign journalists are in Pyongyang for North Korea’s biggest national day called “Day of the Sun”.