Donald Trump’s national security advisor said Sunday that the US president would be “pretty disappointed” if North Korea conducted a new missile test, but he refused to confirm reports that such a test may be near. John Bolton appeared notably cautious when asked on ABC’s “This Week” about a report that satellite imagery appears to show preparations at a North Korean site for the possible launch of a missile or space rocket. On Friday, the website of NPR posted a satellite image that the public broadcaster said showed intense activity around the North’s Sanumdong site, where missiles and satellite-launching rockets have previously been assembled.