spagiola (234461) writes "Late last week, a military transport aircraft with 17 people on -board went missing near Robinson Crusoe, Chile. The relatives of one of the crash victims logged into Find My iPhone and were able to isolate the coordinates of the last known whereabouts of the plane before it crashed." Link to Original Source
Quantum Mechanics is a lovely introduction to Hilbert Spaces!
-- Overheard at last year's Archimedeans' Garden Party