LAS VEGAS // President Bush recently echoed Vice President Dick Cheney's support for Croatia to join the European Union, a bid that has been stalled because of the former Yugoslav republic's slowness to own up to and prosecute its 1990s war crimes and its failure to ensure protections and rights for minorities, including returning Serb refugees. Croatia also faces the possibility of being excluded from the 2008 European soccer championship because when an Italian team's fans taunted the Croatian team's fans at a match in August by waving Yugoslavia's old communist flag, the other side took great offense and showed...