Milestones

WON

The 100-m world-championship final, by Usain Bolt, who completed the race in 9.79 sec. The Jamaican runner narrowly beat out rival American Justin Gatlin, by just 0.01 sec., after trailing most of the race. Bolt, widely regarded as the fastest person ever, plans to retire in 2017.

OPENED

Mount Everest, to climbers, for the first time since an earthquake in Nepal earlier this year killed about 9,000 people, including at least 17 who died in an avalanche on the mountain. The first to attempt a climb to the top of the reopened peak will be a Japanese man who lost parts of nine of his fingers the last time he tried.

DIED

• Ieng Thirith, 83, considered the First Lady of the Khmer Rouge. She was Minister of Social Affairs in the genocidal Cambodian government.

• Jacob Bekenstein, 68, physicist who made great advances in the science of black holes. While Stephen Hawking at first disagreed with his theory on the entropy of black holes, he eventually made his own calculations that showed Bekenstein had been right; the theory is now called Bekenstein-Hawking radiation.

• Justin Wilson, 37, IndyCar driver, after an Aug. 23 crash during the penultimate race of the season at the Pocono Raceway in Pennsylvania. He died the next day.