Redskins defensive tackle Albert Haynesworth has been formally charged with misdemeanor assault stemming from what police say was a road-rage encounter in which he threw a punch at a fellow motorist in a Washington, D.C., suburb. Fairfax County police say Haynesworth, 29, and his attorney appeared at a police station Saturday morning. Haynesworth signed a summons warrant charging him with assault and left. Police say a 38-year-old man told investigators he was assaulted by the driver of a pickup truck who was tailgating him on Feb. 2. The driver was later identified as Haynesworth.