Prospectus excerpt:  We are offering 3,600,000 shares of our 7.5% Series H Cumulative Redeemable Preferred Shares of Beneficial Interest, par value $0.01 per share, which we refer to as the ôSeries H Preferred Sharesö. Cumulative distributions on the Series H Preferred Shares will be payable quarterly on or about the 15th day of January, April, July and October of each year, beginning on October 15, 2012. The distribution rate on the Series H Preferred Shares is 7.5% per annum of the $25.00 per share liquidation preference, which is equivalent to $1.875 per share per annum. Except as set forth below and as necessary to preserve our status as a real estate investment trust, or ôREITö, for Federal income tax purposes, we may not redeem the Series H Preferred Shares prior to August 10, 2017. On and after August 10, 2017, we may, at our option, redeem the Series H Preferred Shares, in whole or from time to time in part, by paying $25.00 per share, plus any accrued and unpaid distributions to, but not including, the date of redemption.

In addition, upon the occurrence of a change of control (as defined in this prospectus supplement) that as a result of which our common shares of beneficial interest, par value $0.01 per share (ôcommon sharesö), and the common securities of the acquiring or surviving entity (or American Depositary Receipts (ôADRsö) representing such securities) are not listed on the New York Stock Exchange (the ôNYSEö), the NYSE MKT (the ôNYSE MKTö), or the NASDAQ Stock Market (ôNASDAQö), or listed or quoted on a successor exchange or quotation system, we may, at our option, redeem the Series H Preferred Shares, in whole or in part and within 120 days after the date on which such change of control occurred, by paying $25.00 per share, plus any accrued and unpaid distributions to, but not including, the date of redemption. If we exercise any of our redemption rights relating to the Series H Preferred Shares, the holders of Series H Preferred Shares will not have the conversion right described below. The Series H Preferred Shares have no maturity date and will remain outstanding indefinitely unless redeemed or repurchased by us or converted into our common shares in connection with a change of control by the holders of the Series H Preferred Shares.