On November 1, U.S. Bank National Association, acting in its capacity as trustee for Citigroup Mortgage Loan Trust 2007-AHL2, filed a lawsuit in the Supreme Court for the State of New York against Citigroup Global Markets Realty Corp. (Citigroup), on behalf of and at the direction of a holder of certificates issued by the trust.  The trustee alleges, inter alia, that Citigroup breached its obligations arising under the Mortgage Loan Purchase Agreement (MLPA) and Pooling and Servicing Agreement for the deal.  In particular, the trustee alleges that certain of the mortgage loans backing the certificates did not comply with the representations and warranties made in the MLPA, and that Citigroup failed to cure or repurchase those mortgage loans.  The trustee seeks rescissory and compensatory damages and/or an order requiring Citigroup to repurchase the loans at issue.  Summons.