Renowned CBS News anchor and reporter Walter Cronkite (r.) is seen in a March 1981 file photo with President Ronald Reagan. Dubbed 'the most trusted man in America,' Cronkite broke stories such as President John F. Kennedy's and Martin Luther King Jr.'s assassinations and the landing on the moon. Cronkite died in his home in July 2009. UPI Photo/NEWSCOM/FILE
Walter Cronkite was anchorman for the CBS Evening News for 19 years. NEWSCOM/FILE
At the Sheraton Center in Toronto, Ontario, Walter Cronkite told the audience that 'at some point of depression I'm concerned that we're doing very poorly,' in relation to television's role in informing and educating the public. NEWSCOM/FILE
Walter Cronkite presents 'You Are There' on CBS in 1953. WENN.com/NEWSCOM/FILE
A reporter and anchor during both World War II and Vietnam, Walter Cronkite said the drawback of his celebrity is not being able to report without being besieged by autograph seekers. NEWSCOM/FILE
In 1991, CBS anchor Walter Cronkite testifies before the US Senate Committee in Washington on Governmental Affairs concerning the Pentagon rules on media access to the Persian Gulf War. Luke Frazza/AFP/NEWSCOM/FILE
Actor George Clooney stands with Walter Cronkite in this September 2007 photo in New York City at a private screening of the film 'Michael Clayton.' Jimi Celeste/Sipa Press/NEWSCOM/FILE
Renowned television anchor and reporter Walter Cronkite gives an interview at the Kennedy Space Center in Cape Canaveral, Fla., in April 1994. AFP/NEWSCOM/FILE
Walter Cronkite is seen in this 2003 photo when he hosted the 26th Annual Kennedy Center Honors in New York. WENN.com/NEWSCOM/FILE
Walter Cronkite is seen here in his study. Cronkite began his career as a journalist in 1937 and in 1950 landed a job with CBS News. He would work there until 1981. Upon retirement, Cronkite was awarded the highest honor a US civilian can receive, the Presidential Medal of Freedom. NEWSCOM/FILE
The attack immediately raised the specter of terrorism, with Canada already on heightened alert because of a deadly hit-and-run earlier in the week against two Canadian soldiers by a man who police say was fired up with radical Muslim fervor.
ByJeremy Hainsworth and Rob Gillies, Associated Press
Adrian Wyld/The Canadian Press/AP
A gunman with a scarf over his face shot to death a Canadian soldier standing guard at the nation's war memorial Wednesday, then stormed Parliament in a hail of gunfire before he was killed by the usually ceremonial sergeant-at-arms, authorities and witnesses said.