17 January 2019, Brandenburg, Potsdam: View of the defused world war bomb. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: The blasting masters Mike Schwitzke (r) and Robert Kuhdick kneel next to the defused World War Bomb and hold a detonator in their hands. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: Explosives master Mike Schwitzke kneels next to the defused World War Bomb and holds a detonator in his hand. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: Explosive engineer Mike Schwitzke kneels next to the defused World War Bomb. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: The explosives master Mike Schwitzke holds the detonator of the defused world war bomb in his hand. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: The blast master Mike Schwitzke (r) and Potsdam's Lord Mayor Mike Schubert (SPD) sit next to the defused world war bomb. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: An employee of the Ordnungsamt inspects a building in the Speicherstadt. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: Policemen are standing on the station forecourt. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: View of a barrier. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: View into the trap circuit. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: View of a construction site where a world war bomb was found. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: View of the empty main station. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB

17 January 2019, Brandenburg, Potsdam: Two policemen are standing in the cleared central station. After the discovery of a 250 kilogram bomb from the Second World War in downtown Potsdam, the evacuation is in full swing. (to "Sperrkreis in Potsdam wegen Bombenentschдrfung geschlossen" of 17.01.2019) Photo: Julian Stдhle/dpa-Zentralbild/ZB