18 The decant of staff out of Main Building was completed in August 2001 three months ahead of schedule and building work has since started. MOD has been pleased with the progress made to date and has been building an effective relationship with Modus and their principal contractors. In particular, MOD has conducted a series of partnering workshops, adopted a joint mission statement with Modus, maintained continuity of well-trained and appropriately skilled staff and adopted appropriate change procedures. It is too early to predict whether the redevelopment will be successfully completed by the required deadline of 30 November 2004 but the early progress is encouraging. As a result of the acts of terrorism targeted at prominent buildings in America on 11 September 2001 MOD is reviewing its security needs at Main Building but has not yet decided if further work will be needed to address security needs.