An interesting find by bloggers:
First, Reuters are at it again. They apparently edited pictures from the Turkish ship to crop out knife wielding activists, as well as blood, presumably from the Israeli soldiers. See
here. (Warning, original includes some blood, so do not view if that would bother you.)
Then, another blogger
notices that the knife used is a combat knife, and furthermore, it does not appear in the pictures of knives captured by the IDF. The blogger than speculate that the Turkish activists may have thrown some weapons overboard.
As always, with bloggers investigating from afar, it is hard to be sure. However, it seems to me they got it right in this case.