Photo taken on April 1, 2020 shows a knitted heart on a crack of a building damaged by earthquakes in Zagreb, Croatia. A magnitude-5.4 earthquake on March 22 and its aftershocks caused severe damage to Zagreb. (Jurica Galoic/Pixsell via Xinhua)

Photo taken on April 1, 2020 shows a knitted heart on a crack of a building damaged by earthquakes in Zagreb, Croatia. A magnitude-5.4 earthquake on March 22 and its aftershocks caused severe damage to Zagreb. (Jurica Galoic/Pixsell via Xinhua)