Taipei, Taiwan AP  —  The United States has approved $2 billion in arms sales to Taiwan , including the first-time delivery to the self-ruled island of an advanced surface-to-air missile defense system, in a move that has drawn China’s criticism. Taiwan’s presidential office on Saturday thanked Washington for greenlighting the potential arms sales. Under the island’s new president, Lai Ching-te, Taiwan has been stepping up defense measures as China increased its military threats against the