Security beefed up at Christchurch Aerospace Summit after 30 arrests in protests last yearCrimeOct 1 at 3:47 PM – Oct 1 at 5:20 PM3 outletsNew ZealandStuffSecurity beefed up at Christchurch Aerospace Summit after 30 arrests in protests last year seen Oct 1 at 5:20 PMOtago Daily TimesProtesters gather outside aerospace summit in Christchurch Oct 1 at 4:11 PMThe PostSecurity beefed up at Christchurch Aerospace Summit after 30 arrests in protests last year Oct 1 at 3:47 PM