Updated at 2:50 p.m. ET

Acting Defense Secretary Patrick Shanahan has removed himself from consideration to permanently lead the Defense Department.

Updated at 1:45 p.m. ET

Google is committing $1 billion to try to provide more affordable housing in the San Francisco Bay Area, where big tech firms have been blamed for putting home prices out of reach for anyone without a rich stock-option plan. Google says the money should result in 20,000 new homes added to the local market, over 10 years.

Facebook is branching into cryptocurrency, unveiling a new blockchain-based currency called Libra that could challenge bitcoin. Libra will be controlled by a nonprofit group in which Facebook will share responsibilities with companies ranging from Mastercard and PayPal to Uber and eBay.

The currency, which is still in the testing phase, is expected to launch in 2020. Facebook says Libra will have very low fees and that people using its apps will make a number of payments simply by sending a text message.

Updated at 11:53 a.m. ET

When students are believed to be a danger to themselves or others, they're sometimes restrained in school or isolated in a separate room. These practices, known as restraint and seclusion, are supposed to be a last resort, and they disproportionately affect boys and students with disabilities or special needs.