They did this by putting pieces of silicon or one of a number of other solid materials inside a shoe-box-sized cavity and zapping the material with microwaves from a metal tip.
Days after his arrival, an angry lawyer threw a shoe at Musharraf inside a court building in Karachi as he made his way to a courtroom to face a series of legal charges against him, including ones related to the 2007 assassination of former President Benazir Bhutto.