Beit Chatham, an expert on transatlantic relations by Gregoire Ross:
Obama drew a red line in Syria: if Assad uses gas, the US will intervene. France and Britain said they would join. Gas is used.
The French were ready but Obama said maybe not. Cameron appealed to Parliament and got a no. France was left alone.
Then came Afghanistan. The sudden withdrawal, the tragic images of people clinging to planes at Kabul airport.
Full interview