United Airlines: Timeline

1933   A United Airlines Boeing 247 is destroyed near Chesterton, Indiana by a bomb. This was the first proven case of air sabotage in commercial airline history.

1955   Time bomb explodes aboard a United Airlines DC-6 killing 44 above Longmont, Colorado.

1956   A TWA Twa

The Twa are a pygmy [i] people, of short stature, who were the oldest recorded inhabitants of the Great Lakes [i] ... 

 Lockheed Constellation and United Airlines Douglas DC-7 collide in mid-air over the Grand Canyon in Arizona Arizona

Arizona is a U.S. state [i] located in the Southwestern United States [i]. ... 

 and crash. All 128 people aboard the two aircraft are killed in the disaster. The accident prompts tighter air traffic control to be implemented in the United States.

1960   December 16 — 1960 New York air disaster: United Airlines DC-8 collides with a TWA Twa

The Twa are a pygmy [i] people, of short stature, who were the oldest recorded inhabitants of the Great Lakes [i] ... 

 Super-Constellation over Staten Island Staten Island

Staten Island is one of the five boroughs [i] of New York City [i]. ... 

, New York City New York City

[i] in the [[United States]... 

. All 128 passengers and crew on both planes are killed, as are 6 persons on the ground.

1972   Vietnam War Vietnam War

The Vietnam War was a conflict in which the Democratic Republic of Vietnam [i] and its al ... 

 veteran Richard McCoy hijacks a United Airlines jet and extorts $500,000 – he is later captured.

1972   United Airlines 737 Boeing 737

The Boeing 737 is the world's most popular medium-range, narrowbody [i] commercial ... 

 from Washington National to Chicago Midway crashes short of the runway, killing 43 of 61 onboard and two on ground.

1980   A Unabomber bomb injures United Airlines president Percy Wood in Lake Forest, Illinois.

1997   The Star Alliance is formed between Air Canada Air Canada

irline=Air Canada | logo=Air Canada Logo.svg| ... 

, Lufthansa Lufthansa

irline=Lufthansa| logo=Lufthansa Logo.svg| ... 

, SAS, Thai Airways International and United Airlines.