If it sounds far-fetched for a man without lower legs to become one of the fastest runners on the planet, how about typing by just thinking the words or staying sporty well into old age? Such prospects motivate work at Ossur, the Icelandic group behind the prosthetics that vaulted double-amputee Oscar Pistorius into the limelight with his bid to compete in the Beijing Olympics.







 Democrat Barack Obama plunged Wednesday into a five-month election battle with Republican John McCain after making history by becoming the first black presidential nominee of a major US party.