Iraq's army has "opened its doors" to all former members of Saddam Hussein's army, the prime minister said Saturday at a national reconciliation conference boycotted by one of his main Shiite allies, a major Sunni group and Iraq's exiled opposition. Despite Prime Minister Nouri al-Maliki's effort to reach out to Iraq's Sunni Arabs and some former members of Saddam's outlawed Baath Party, the gathering was overshadowed by rising sectarian tensions and political divisions. The radical Shiite cleric Muqtada al-Sadr, one of al-Maliki's key political backers — refused to attend the meeting, as did a major Sunni group and former Prime...