Opposition parties in South Korea have submitted a motion to impeach President Yoon Suk-yeoul following his controversial declaration of martial law, which has led to political turmoil. The motion requires significant parliamentary support and has sparked calls for resignations among Yoon's advisers and Cabinet members. The martial law, declared in a televised address, was quickly lifted after backlash from lawmakers. The situation has raised concerns both domestically and internationally, with the U.S. expressing serious concern over the developments.