The men eventually finish the balloon but have no time to test it. On 15 September 1979, the families prepare to act on the plan while the Stasi finds blood-pressure medicine belonging to Peter's wife Doris where the first balloon had landed. The Stasi contacts the pharmacy and is able to identify the owner of the pills as Doris.
The men finish building the balloon but don't have time to test it; on September 15, 1979, families are about to carry out their plan while the Stasi finds medication belonging to Peter's wife at the site of the first balloon landing. The Stasi identifies Doris as the owner of the pills.