The chairman of Samsung Electronics, the world's biggest smartphone and chip maker, has been jailed for sabotaging union activities, prompting a rare apology on Wednesday from the firm. Chairman Lee Sang-hoon and executive vice president Kang Kyung-hoon were both sentenced to 18 months for leading a wide-ranging operation to deter staff at Samsung's customer service unit from operating a union. Samsung Electronics is the flagship subsidiary of the Samsung group ...