Soldiers dressed in period uniforms attend the nightly cannon ceremony at San Carlos de la Cabaña Fortress in Havana, Cuba, late Thursday, June 24, 2021. The blast originally signified the closing of the city gates and the lifting of the harbor chain to secure the city, and now during the COVID-19 pandemic, it marks the start of the nightly curfew put in place to help contain the spread of the virus. (AP Photo/Ramon Espinosa)