Michael Rakowitz's version of a destroyed Iraqi sculpture is the 12th to sit atop the London monument.
Caroline Sunshine, who starred in the Shake It Up TV series, will work in Mr Trump's press office.
The celebrity has responded to criticism of a photo she posted where a car and parking lines looked odd.
Tackling fake news and improving the iPlayer are also among the BBC's priorities for the year ahead.
The social network claims the overhaul will make it easier for users to find and edit their data.
Leonard Nimoy's son and actress Terry Farrell married on what would have been his 87th birthday.
"You can't have an agreement covering up criminality," his former aide tells a Commons committee.
Experts say the painting donated to the University of Aberdeen in the 1860s is by the Venetian artist.
A Manchester-led team tests the detector system it will use in Antarctica to find hidden iron meteorites.
Academy president John Bailey will face no action after being accused of sexual harassment.