A training exercise involving U.S. B-52 bombers and South Korean planes was scrapped earlier this week after the South Korean government expressed concerns that it could generate tensions before the summit meeting between President Donald Trump and North Korean leader Kim Jong Un, according to U.S. officials.
The move follows repeated assertions by the Trump administration that it is keeping up a campaign of maximum economic and military pressure until North Korea gives up its nuclear-weapons programs and that the U.S. has...