 Complete the following phrase:  In February 2011, it was targeted by vandals who sprayed it with graffiti. Only a fortnight later, the February 2011 Christchurch earthquake struck, damaging the arch. Permanent repair and earthquake strengthening was estimated to cost over NZ2m. Christchurch City Council initially considered placing a temporary steel structure around the arch, but, at NZ430,000, have since dismissed this idea as being too expensive. The Returned Services Association expressed dismay at the decision to not go ahead with the temporary work, citing fears of losing the heritage structure altogether in another strong aftershock, in just the same way as happened to the Lyttelton Timeball Station in the 