Edition: Singapore Indonesia Asia US/UK WASHINGTON: The United States, Japan, India and Australia pledged on Tuesday (Jul 2) to work together to ensure a stable supply of critical minerals, as worries grow over China's dominance in resources vital to new technologies. US Secretary of State Marco Rubio welcomed his counterparts from the so-called "Quad" to Washington in a shift of focus to Asia, after spending much of his first six months on the wars in Ukraine and the Middle East and on