President Bush leaves Saturday for a weeklong trip to Asia, and he's keeping his options open for dealing with North Korea in the face of evidence it is trafficking in ballistic missiles. National security adviser Condoleezza Rice, briefing reporters ahead of Mr. Bush's trip to Japan, South Korea and China, said the United States remained interested in a dialogue with North Korea, but "we want dialogue on some specific issues. We don't want dialogue for the sake of dialogue." In Seoul, Mr. Bush is expected to be greeted with anti-American protests. Many South Koreans are upset that he included North Korea as part of the so-called "axis of evil." NPR's Eric Weiner reports.