You can fill a millitary plane with all the deadly instruments of war that it can take - but not - it would seem, with even more deadly instruments, like trombones, drums and trumpets!

http://www.theyworkforyou.com/wrans/?id=2011-05-13a.251.6

Lord Berkeley: To ask why they transported a military band to the Falkland Islands to celebrate the Queen's birthday on 21 April after their musical instruments were removed before take-off; what contribution the band was able to make to the celebrations with...out any instruments; and what were the costs of such personnel transport to and from the UK

John King: Comments:
Apparently, the reason musical instruments cannot be taken as hand luggage is because of terrorism. But this was not a civilian flight - it was the ARMY.