Beirut has marked a week since the catastrophic explosion that killed at least 171 people, injured thousands and plunged Lebanon into a deeper political crisis. Thousands of people marched near the capital city’s devastated port, remembering those who died in the worst single blast to hit Lebanon. They observed a minute of silence at 6.08pm local time, the moment on August 4 that thousands of tonnes of ammonium nitrate exploded in the city’s port where it had been stored for more than six years, apparently with the knowledge of top political and security officials.