* Biden says government will provide 500 million free Covid home-testing kits
* Putin warns of possible military response to what he sees as NATO pressure
* Moderna may produce Omicron booster within weeks, says company CEO
* Israel begins offering a fourth dose of coronavirus vaccine
* US life expectancy slipped 1.8 years in 2020, reports CDC
* Shipping giant Maersk to acquire Hong Kong-based LF Logistics
* US current account deficit at biggest gap in 15 years in third quarter: