Unionized workers of Korea Railroad Corp. said Wednesday they will launch an indefinite general strike at 9 a.m. on Dec. 10, demanding improvements to the promotion system and the employment of more safety-related personnel. The Korean Railway Workers' Union announced the plan in a news conference at Seoul Station, warning the walkout will proceed unless its demands are met. In a statement, the union criticized the current promotion system for "unfairly" excluding field workers and said staff sh