Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].

Input: Consider Input: Broward County police admitted that even more warning flags were missed that could have prevented  the horrible shooting by Nikolas Cruz at a Florida high school .
The Miami Herald reports that a tipster called the Broward Sheriffâs Office warning them that  Cruz  âcould be a school shooter in the making.â Deputies neglected to write up the warning in a report.
Two weeks prior to that tip being called in  a relative of  Cruz  also told police that they should seize his weapons.
Astoundingly  a third report was missed when two years before  the shooting a deputy  investigated a warning about  Cruz  saying  he  âplanned to shoot up the school.â

Output: Even more astounding warnings missed in Florida school shooting


Input: Consider Input: Image copyright Getty Images Image caption  Prime Minister of Canada Justin Trudeau  departs a press availability at the Canadian Embassy in Washington
In 2017   Canadian Prime Minister Trudeau  learned a lesson about the power of social media.
 Trudeau 's January tweet "isn't necessarily the sentiment being held by a lot of Canadians".
 Mr Trudeau  ended 2017 in an ethics quagmire partly of  his  own making.
Meanwhile   Trudeau 's finance minister  Bill Morneau  is struggling with his own ethics troubles.
A mid-December poll by the Angus Reid Institute indicated that for the first time since his election   Trudeau 's approval ratings had dropped below 50%.
 Trudeau 's ratings are still strong for a politician  but Kurl says there is "perhaps a little bit less adoration and a little bit more exasperation with the prime minister".
As the two rival leaders find their feet - and if  Trudeau  and  his  ministers keep handing them easy ammunition - 2018 could also prove a rough ride.

Output: The tests facing Canada's PM Justin Trudeau in 2018


Input: Consider Input: The move led to the appointment of a special counsel in May 2017  a development that continues to infuriate the President. While  Trump  often directed that anger at Sessions  by June  he  turned  his  ire to Mueller and wanted the special counsel fired  a source confirmed to CNN after it was first reported in The New York Times. White House counsel Don McGahn refused to order the Justice Department to fire Mueller  the source said  because he disagreed with the President's reasoning.
 Trump  appeared in good spirits Friday morning as  he  prepared to deliver remarks in Davos  a source who spent time with  Trump  behind the scenes said. There was no sign that  he  was perturbed by reports about  his  move to fire Mueller  this person said  and  Trump  didn't bring up the topic.
But ever since a special counsel was named  the President's frustrations have continued to simmer.  Trump  has come to view Rosenstein as one-in-the-same as Mueller -- another government official who is out to get the President  one source said.
Sources described  Trump 's frustration with Rosenstein as largely bluster.
In explaining his urge to fire Mueller  The Times  citing two people  said the President said there was a conflict of interest based on Mueller's dispute with one of his golf clubs over fees  the fact that Mueller worked at  the same law firm that was representing Trump's son-in-law Jared Kushner   and that Mueller interviewed for the FBI director position the day before he was named special counsel. A source tells CNN another reason  Trump  wanted to fire Mueller was  his  perception that Mueller was close friends with Comey. The two men are professional acquaintances.
As for McGahn   he  was already prone to becoming frustrated with the President and had threatened to quit over different issues  including  Trump 's choice of lawyers to defend the President and White House  according to a source familiar with the situation. But the pressure in June to fire Mueller caused McGahn to tell others  he  would resign  and this time  he  packed up some of  his  belongings in boxes  according to two people familiar with the matter.
Before the news broke Thursday  those who have worked closely with McGahn in recent weeks said they believe  he 's committed to staying at the White House. But  his  fate could depend on how Trump reacts upon  his  return to Washington.


Output: Trump turns Russia frustration to Rosenstein