An Italian flight crew had to make an emergency landing at Logan recently because a "foul odor" overcame them on the plane. Everyone wound up being all right, but airport officials were worried about toxins and other possible nefarious goings-on. Now we know that the foul odor was relatively harmless, at least in small quantities. The Herald reports that the aforementioned odor was actually four pallets of onions. Really stinky ones, apparently. But the real......