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The bidding period has closed for the companies hoping to design and deliver the president's signature campaign promise. Here's a glimpse of some proposals — from wire mesh to 30-foot pipe organs.

A CDC advisory panel concluded the nasal spray vaccine is so ineffective that it shouldn't be used by anyone during the 2016-2017 flu season. Until 2015, the spray was the top choice for kids.

The lessons of the final deal come down to this: Washington is very nearly broken. Next up? Finishing the work this agreement postponed.

At issue is whether the University of Texas, Austin discriminated against a white applicant when it did not offer her a spot. At Wednesday's argument, a court majority seemed poised to reverse or severely cut back previous decisions related to affirmative action programs in college admissions.

They were talented, idealistic risk-takers on the road to what they thought would be important medical discoveries. But when the funding for risk-takers dried up, these two academics called it quits.

Xinjiang has nearly 20,000 glaciers, half of China's total. They're all receding at a record pace — and will continue to melt, some scientists warn, even if global temperatures stop rising.

Donald Trump named a conservative media provocateur to lead his campaign — in the third major shakeup during the election season. David Greene talks to senior Trump adviser Boris Epshteyn.

A new study by three media scholars reveals how the social protest movement spread on Twitter, with some fascinating — and sobering — findings.

Airstrikes have helped push back the Islamic State in some places, but the group has gained in other areas. Pentagon officials say the U.S. operation may need another two years or more to succeed.

The Supreme Court hears arguments on the ban Wednesday, and a bipartisan group of former national security officials from the Reagan to Obama administrations are urging the court to strike it down.