A law used to prosecute animal-rights activists who set 2,000 minks loose does not run afoul of the U.S. Constitution, a federal appeals court has held.The 7th U.S. Circuit Court of Appeals last week affirmed U.S. District Judge Amy St. Eve’s decision to allow the prosecution of Kevin Johnson and Tyler Lang under the Animal Enterprise Terrorism Act to proceed.After St. Eve denied their motion to dismiss the indictment against them, Johnson and Lang entered conditional pleas of guilty but reserved the right to appeal …