Toby Keith traveled Friday (April 30) from Seoul, South Korea, to Germany as part of his four-nation tour sponsored by the USO and Armed Forces Entertainment tour. Describing his visit to the demilitarized zone between North and South Korea, he wrote in a Twitter message, "Soldiers on both sides stand few feet apart -- stare emotionless for hrs -- daring the other 2 challenge. I walked right between. Creepy!" He also noted, "W/o question -- after 145 USO shows -- most bizarre behavior by 2 enemies I've ever witnessed." His 14-day USO tour will also include a visit to the Persian Gulf. "I've been traveling with the USO since 2002, and every year I look forward to spending time with the men and women who serve this great country," he said in a written statement. "When I get on stage and look out into a crowd of uniforms, it gives me a great sense of pride to know that I am giving back to them." View photos of Toby Keith's USO tour.