thousands of royal mail workers in the uk stage a second day of strike action in a row over pay, disrupting deliveries of packages and letters. a new study shows the impact of climate change on the shrinking glaciers of switzerland. hello and welcome if you re watching in the uk, or around the world. the last leader of the soviet union, mikhail gorbachev, has died, aged 91, following a long illness. mr gorbachev was crucial to ending the cold war. he was one of the most influential political figures of the 20th century. world leaders have been paying tribute. the un chief antonio guterres said he changed the course of history . president biden described him as a man of remarkable vision , who created a safer world . however, in a stamement this morning the kremlin said his romanticism about better relations with the west had been misplaced. our moscow editor, steve rosenberg, looks back at his life. he was the kind of russian leader the world had never seen. mikhail gorb
and it makes ourjob more challenging, i have to say. you have to think more about risk management. that s all part of things we didn t have, like, 20 years ago when i start guiding. across switzerland, rock falls triggered by melting permafrost have closed climbing routes but the changes started long before this hot summer. since the 1930s, the glaciers have lost more than half their volume. 20 years ago, this glacier was actually much bigger. and you can see behind me, the rock is emerging where the ice has split apart in the last few years. and if you take a moment to listen. rushing. ..that rushing sound is the ice melting and pouring down into the valleys. so we re probably one of the first people walking here. the ground up here hasn t been seen for thousands of years. now the remaining ice has been