WASHINGTON (AP) - A few details are coming out about the secret meeting between Hillary Rodham Clinton and Barack Obama. Senator Dianne Feinstein (FYN'-styn) says the two met at her home last night. They arrived separately, and the California Democrat says she took them to her living room, where she left them seated in "two comfortable chairs facing one another" Feinstein says no one else was present. About 10 o'clock, the two presidential candidates emerged laughing from the hour-long meeting. Feinstein says at that point she said "good night" and "that was it." This morning, Clinton's campaign announced she would deliver a formal endorsement of Obama at noon tomorrow in Washington and urge Democrats to unite behind his candidacy. Feinstein supported Clinton throughout the primaries. She says it was the former first lady who called yesterday afternoon to ask for the use of the house. Feinstein describes Obama as "very gracious" about setting up the meeting, saying he would go "wherever, whenever" Clinton wanted.