A protester sticks a "unity flag" with the shape of Korean peninsula on his mask during an anti-American protest in Seoul December 31, 2001. [Relations between two Koreas improved with last year's historic June 15 summit between the two Korean leaders and raised hopes for reconciliation but North's Kim Jong-il has held back on a promised return visit to Seoul in apparent anger at a decision by George Bush to review U.S.- North Korean ties. The flag reads, "Implement the united proclamation of two Korean leaders" and "Pulverize United States' machinations for war against North Korea".]