The TSD also experimented with dosing a box of cigars with a chemical producing temporary disorientation, which could lead to an embarrassing failed speech by Castro. The CIA inspector general also found a plan to dust Castro's shoes with thallium salts, "a strong depilatory that would cause his beard to fall out." It was supposed to be delivered to Castro when he was traveling abroad, and left his shoes outside his hotel room to be shined, but when Castro canceled the trip, the attempt was abandoned.