 In the early and mid-1960s, Hazel helped steer a development company helmed by Isadore Guldesky, Theodore Lerner, and H. Max Ammerman through a legal maze of ordinances and regulations to construct Tysons Corner Center, at the time one the first super-regional enclosed malls in the country.After a controversial Fairfax County Board vote in favor of the Guldesky-Lerner-Ammerman group and, later, a lawsuit concerning a lease and zoning issue, the highly anticipated Tysons Corner Center was opened in 1968.Hazel also was instrumental in garnering the rezoning needed for Lerner's 117-acre Tysons II mixed-use development, considered by some the key in the urbanization of Tysons Corner.