Nuclear weapons pose a grave threat / Malcolm Fraser -- Nuclear weapons are a necessary deterrent / John Hutton -- Biological weapons pose a serious threat / Bob Graham and Matt Korade -- Terrorists may use advanced conventional weapons / James Bonomo ... et al. -- The United States should sign the Ottawa Convention banning anti-personnel landmines / Trevor Holbrook -- Landmines protect vulnerable populations / Shelby Weitzel -- Improvised explosive devices are a threat to United States armed forces / Rick Atkinson -- The United States is developing precision weapons of war / Sharon Weinberger -- Music can be used as a weapon of war / David Yearsley -- Non-lethal weapons of war may soon be in use / Randy Roughton -- The remote control killing device is a new weapon of war / Jonathan Cook -- Laser weapons will defend ships at sea / Grace V. Jean -- Aerial drones serve as weapons of war / Dan Murphy -- Cyber weapons pose a serious threat to the United States / The Economist -- Organizations to contact.