Contents Bouncing bombs: the physics behind the Dambusters raid Skillset: Oscillations Mathskit: Simple harmonic motion Who were they? Hedy Lamarr Crossword: Clues At a glance: GPS Exam talkback: Radioactive decay and nuclear radiation The Nobel prize in 1918: quantum physics Physics online: The new Elizabethan age Luis Alvarez: a versatile physicist Crossword: Curves, Chaucer and computing: solution and notes Physics and war