Complex sentence: The last major issues were resolved on April 26,2006, when a deal was made between developer Larry Silverstein and the Port Authority of New York and New Jersey, so the cornerstone was temporarily removed from the site on June 23,2006.
Split into simpler sentences: The last major issues were resolved on April 26,2006, when a deal was made between developer Larry Silverstein and the Port Authority of New York and New Jersey. The cornerstone was temporarily removed from the site on June 23,2006.