The science adviser has a unique ability to assemble expertise to address specialised or cross-cutting policy issues.
President Trump's appointment of John Bolton as national security adviser created a unique sense of shock at the State Department, where many diplomats rehashed anecdotes about his aggressive management style and prolific broadsides against the culture of the American diplomatic corps.
Each PhD candidate works with a faculty adviser to design a unique academic and research plan to prepare for their dissertation.
"Gates has played a unique role," said Brent Scowcroft, the national security adviser under the first President George Bush and a close friend of the secretary of defense.
As a Palestinian journalist who used to work as an adviser to Saddam, he has a unique perspective on the workings of the regime.
"It's a unique and very innovative approach," says Michael Brennan, senior adviser for global affairs at Aeras Global TB Vaccine Foundation in Rockville, Maryland.
The physician has traditionally occupied a unique role in society--one of healer, councilor, adviser, advocate, as well as technically proficient practitioner.
Bonnie S. Glaser, a senior adviser for Asia at the Center for Strategic and International Studies, said the photos provided a unique perspective.
He was also a trusted adviser to the Prince of Wales, who saw in Richard a unique combination of wisdom and irreverence - and drew equally on both.
"Iran is a unique kind of threat," said Daniel Senor, one of Romney's close foreign policy advisers, in an interview conducted over the phone and via e-mail.
