President Obama is heading to Tucson, Arizona, today to attend a memorial service for the victims of Saturday’s shooting attack that left Congresswoman Gabrielle Giffords critically wounded, six dead and 13 others wounded. On Monday, the accused gunman, Jared Lee Loughner, appeared in a Phoenix court for his arraignment. Police officials also released a mugshot of Loughner that shows the 22-year-old man smiling into the camera.