South Korea and the United States staged a joint air power demonstration on Tuesday during a visit by U.S. Deputy Secretary of State Wendy Sherman, who said there would be a strong and clear response if North Korea were to conduct a nuclear test.
The demonstration, which involved 20 warplanes including F-35A stealth fighter jets, came a day after the allies fired eight surface-to-surface missiles off South Korea's east coast in response to a barrage of short-range ballistic missiles launched by North Korea on Sunday.
