A 58-story skyscraper in San Francisco that's tilting and sinking now has a concerning window crack

Eric Risberg/AP An apartment owner reported a crack in his window in Millennium Tower, thetallest concrete structure in San Francisco. The building has been sinking—and tilting—for many years, with local developers arguing over the cause of the damage. Structural issues may continue to appear unless engineers follow through on an expensiveplan to retrofit the building. At58 stories and 645 feet high, the luxuryMillennium Toweris thetallest concrete structure in San Francisco. It's also one o...