Plot: Hoynes and Bartlet each make an unexpected announcement about Hoynes' place on the ticket; fears of a terrorist attack arise when a truck carrying depleted uranium-fuel rods is involved in a head-on collision in an Idaho tunnel; Donna seeks a Presidential Proclamation to honor her high-school teacher/mentor who's retiring; and Bartlet's insistence on helping Charlie with his tax return sparks a discussion on the true nature of a tax rebate.