A few excerpts from the article:
"On the afternoon of December 2, 1943, 1st Lt. Werner Hahn piloted his Messerschmitt Me-210 reconnaissance plane over the port of Bari, in southeastern Italy. Cruising at 23,000 feet, his aircraft made a telltale contrail as he streaked across the sky, but Allied anti-aircraft crews took little notice. Still unmolested, the German pilot made a second pass over the city before turning north toward home. If Hahn’s report was promising, the Luftwaffe would launch a major airstrike against the port."
"As 1943 drew to a close, Bari’s medieval torpor and somnolent grace were shaken off by the influx of Allied shipping into its harbor. Tons of supplies were offloaded almost around the clock, transforming the once quiet town into a hive of activity. On December 2, at least 30 Allied ships were crowded into the harbor, packed so tightly they almost touched.
The port was under the jurisdiction of the British, in part because Bari was the main supply base for General Bernard Law Montgomery’s Eighth Army. But the city was also the newly designated headquarters of the American Fifteenth Air Force, which had been activated in November of that year. The Fifteenth’s primary mission was to bomb targets in the Balkans, Italy and especially Germany. Fifteenth Air Force commander Maj. Gen. James H. ‘Jimmy’ Doolittle had arrived in Bari on December 1."
"Although the gas was mentioned in official American records, Churchill insisted British medical records be purged and mustard gas deaths listed as the result of ‘burns due to enemy action.’ Churchill’s attempts at secrecy may have caused more deaths, because had the word gone out, more victims, especially Italian civilians, might have sought proper treatment. Axis Sally, the infamous propaganda broadcaster, learned the truth and taunted the Allies. ‘I see you boys are getting gassed by your own poison gas,’ she sneered."