Rolfe and Gary Christopher were hired by persons unknown to take aerial photographs of new construction at a plant that DuPont was building to exploit a highly secret unpatented process for producing methanol. The process gave DuPont a competitive advantage over other producers. All the photographs were taken from public airspace and violated no governmental aviation standard. Further, the Christophers did not have any confidential relationship with DuPont and did not violate any laws while taking the photographs. DuPont sued the Christophers for misappropriation of its trade secrets. Are the Christophers liable for misappropriation of DuPont’s trade secret? Explain.