FILA, the international wrestling federation, announced a postponement of the 2001 World Championships of Wrestling, originally scheduled for September 26-29 at Madison Square Garden in New York City.    The announcement was made in a letter, sent via FAX, to all national wrestling federations and FILA Bureau members, dated September 15, and signed by FILA President Milan Ercegan.    USA Wrestling formally requested from FILA a postponement of the 2001 World Championships of Wrestling, in a letter sent via FAX on September 14.    According to Ercegan's letter, the postponement was approved by the FILA Executive Committee. The reason for the postponement was in "respect for the families of the persons who died or disappeared and for security reasons for the participants in the Championship."    The letter indicated that "the new place and date of the Championships will be decided at the end of September." It also indicated that "we foresee the Championship to be held in October or the beginning of November."    NYC2012, the organizing committee, is working with USA Wrestling and other groups to present a plan to FILA to host the Championships in New York at a later date.    Prior to the postponement, a total of 693 athletes from 82 nations confirmed with USA Wrestling that they intended on participating in the competition, making it the largest World Championships ever.