The Supreme Court begins oral arguments today on the legality of President Obama’s sweeping health care legislation. The arguments today mark the beginning of three days of hearings, although  a ruling won’t come until later this summer. In other headlines, President Obama meets with China’s president today after a two-day nuclear security summit in South Korea; a man wearing an Afghan army uniform opened fire this morning on a NATO base in southern Afghanistan, killing two British soldiers; and minor damage is reported in central Chile following a 7.1 magnitude earthquake.