Question:  Marc-André Fleury won two silvers at which event held in late December?

Context paragraphs:
Walter Feist: Walter Feist (1907–1977) was a German luger who competed from the late 1920s to the late 1950s.  He won seven medals in the men's doubles event at the European championships with five golds (1929, 1934, 1935, 1938, 1939) and two silvers (1928, 1937).

List of NHL goaltenders with 300 wins: Winning 300 regular season games in the National Hockey League (NHL) is a rare and celebrated milestone for a goaltender.  Thirty-one goaltenders have reached this mark in NHL history; the first was Turk Broda of the Toronto Maple Leafs, who reached the milestone on December 20, 1950.  The most recent was Marc-André Fleury of the Pittsburgh Penguins, who won his 300th game during the 2014–15 NHL season.  Jacques Plante of the Montreal Canadiens was the fastest goaltender to reach the 300-win mark, achieving the milestone in his 528th game played.

Marc-André Fleury: Marc-André Fleury (born November 28, 1984) is a French-Canadian professional ice hockey goaltender playing for the Vegas Golden Knights of the National Hockey League (NHL).  Drafted out of the Quebec Major Junior Hockey League (QMJHL) first overall by the Pittsburgh Penguins in the 2003 NHL Entry Draft, Fleury played major junior for four seasons with the Cape Breton Screaming Eagles, earning both the Mike Bossy Trophy as the league's top prospect and the Telus Cup as the top defensive player in 2003.  He joined the Penguins in 2003–04 and has won three Stanley Cup championships with the team in 2009, 2016, and 2017.  Internationally, Fleury has represented Canada twice as a junior, winning back-to-back silver medals at the World Junior Championships in 2003 and 2004.  He won a gold medal with Team Canada at the 2010 Winter Olympics in Vancouver.

Christian Auer: Christian Auer (born April 4, 1966) is an Austrian skeleton racer who competed from the late 1980s to the 2002 Winter Olympics.  He won five medals in the men's event at the FIBT World Championships with one gold (1991), two silvers (1989, 1995), and two bronzes (1992, 1996).

IIHF World U20 Championship: The IIHF Ice Hockey World Junior Championships (WJC), commonly known simply as the World Juniors, is an annual event organized by the International Ice Hockey Federation (IIHF) for national under-20 ice hockey teams from around the world.  It is traditionally held in late December, ending in the beginning of January.

Ferruccio Dalla Torre: Ferruccio Dalla Torre (sometimes shown as Ferruccio dalla Torre; born November 4, 1931) is an Italian former bobsledder who competed from the late 1950s to the mid-1960s.  He won three medals in the four-man event at the FIBT World Championships with one gold (1963) and two silvers (1959, 1962).

Steve Backley: Stephen James Backley, OBE (born 12 February 1969) is a retired British track and field athlete who competed in the javelin throw.  He formerly held the world record, and his 91.46 m throw from 1992 is the British record.  During his career, he was a firm fixture in the British national athletics team.  He won four gold medals at the European Championships, three Commonwealth Games gold medals, two silvers and a bronze at the Olympic Games, and two silvers at the World Championships.

Stefan Ulm: Stefan Ulm (born December 21, 1975 in Berlin) is a German sprint canoer who competed from 1997 to 2004.  Competing in two Summer Olympics, he won two silvers in the K-4 1000 m event (2000, 2004).

Caroline Brunet: Caroline Brunet (born March 20, 1969 in Quebec City, Quebec) is a Canadian sprint kayaker who competed from the late 1980s to 2004.  Competing in five Summer Olympics, she won three medals in the K-1 500 m event with two silvers (1996, 2000) and one bronze (2004).

Otto Göbl: Otto Göbl (16 September 1936 – 17 July 2009) was a West German bobsledder who competed from the late 1950s to the early 1960s.  He won four medals at the FIBT World Championships with one gold (Four-man: 1962), two silvers (Two-man: 1960, four-man: 1958), and one bronze (Four-man: 1959).  Göbl also finished fifth in the four-man event at the 1964 Winter Olympics in Innsbruck.

Supporting paragraphs: Marc-André Fleury IIHF World U20 Championship
Answer: World Junior Championships