Mino - IIRC, B of A was one of the larger lines of credit CW yanked on recently. I have never seen an extension of a line of credit or a letter of credit issued absent a security agreement secured by hard assets (e.g., real property, cash). So B of A is in this not only with cash infusion, but also as a lender. It may be that the preexisting lending relationship allows them to grab certain assets.
BTW, I love how we're all pontificating without having read the actual dox.