US-made CM-11 tanks (in background) are fired in front of two 8-inch self-propelled artillery guns during the 35th "Han Kuang" (Han Glory) military drill in southern Taiwan's Pingtung county on May 30, 2019. - The manoeuvres in Taiwan come after the US, Japan, South Korea and Australia kicked off operation "Pacific Vanguard" near Guam, bringing together more than 3,000 sailors from the four countries last week.