After wearing a series of outfits that featured three-quarter-length sleeves this month, Michelle Obama returned to her favorite trend today — sleeveless dresses. She addressed attendees at the Joint Armed Forces Officers’ Wives’ Luncheon at the Bolling Air Force Base in Washington, D.C., wearing a sleeveless forest-green dress, which she accessorized with a sparkly black flower pin. See the full look in the Michelle Obama Look Book.