Barbara T. Alexander Stiles

UBS Securities LLC is an investment bank and registered broker/dealer headquartered in New York City. The firm was founded in 1998 as UBS Warburg LLC. They are a subsidiary of UBS Americas Holding LLC, ultimately held by UBS Group AG (SWX: UBSG, NYSE: UBS) in Switzerland. UBS Securities is a primary dealer in US Government securities and provides a full range of investment banking services which includes corporate finance, mergers and acquisitions, capital markets, trading and sales, fixed-income, equity research, private banking, underwriting and prime brokerage operations. The firm also provides advisory services and access to capital markets for corporate, institutional, intermediary and alternative asset management clients.

Allied World Assurance Co. Holdings AG engages in the provision of insurance and reinsurance solutions. It operates through the following segments: North American Insurance, Global Markets Insurance, and Reinsurance. The North American Insurance segment offers general property and healthcare assistance products. The Global Markets Insurance segment caters to professional liabilities, marine, aviation, and on-shore construction operations. The Reinsurance segment includes property and casualty assurance services. The company was founded on November 13, 2001 and is headquartered in Zug, Switzerland.

Habitat for Humanity International, Inc. is a non-profit organization that seeks to eliminate poverty housing and homelessness and to make decent shelter a matter of conscience and action. The organization was founded by Millard Fuller and Linda Fuller in 1976 and is headquartered in Atlanta, GA.

Covenant House provides voluntary services. The firm provides outreach and crisis centers for homeless and runaway youths. It offers food, shelter, clothing, medical and counseling services. The company was founded in 1972 and is headquartered in New York, NY.

Dallas-based Centex Corporation (NYSE: CTX), founded in 1950, is a home building company. Centex Homes operates in major U.S. markets in 25 states and delivered more than 33,000 homes in the United States in its most recent fiscal year ended March 31, 2005. Its leading brands include Centex Homes, Fox & Jacobs Homes and Centex Destination Properties. The company, which handles commercial construction chores for parent Centex Corporation, offers start-to-finish project management and construction services, including site evaluation and analysis, general contracting, cost consulting, process equipment installation, turnkey medical facility development, capital equipment planning, and closeout services. Typical projects include such facilities as hotels, office buildings, civic centers, airports, hospitals, industrial facilities, schools, public buildings, and retail locations.

Joint Center for Housing Studies operates as a non profit organization that advances understanding of housing issues and informs policy. The firm operates through its research, education, and public outreach programs and helps leaders in government, business, and the civic sectors make decisions that address the needs of cities and communities. The company was founded in 1959 and is headquartered in Cambridge, MA.

Caesars Holdings, Inc. is a holding company, which engages in the provision of casino-entertainment and hospitality services. It operates through the following segments: Las Vegas, Other U.S., and All Other. The All Other segment includes managed and international properties as well as other business, such as Caesars Interactive Entertainment. Its brands include Aesars, Harrahs, Horseshoe, Wsop, Linq, Caesars, and Paris. The company was founded by William Fisk Harrah in 1937 and is headquartered in Las Vegas, NV.