A bunker is a defensive military fortification designed to protect the inhabitants from falling bombs or other attacks. Bunkers are mostly below ground, compared to blockhouses which are mostly above ground. They were used extensively in World War I, World War II, and the Cold War for weapons facilities, command and control centers, and storage facilities (for example, in the event of nuclear war).

Articles for Bunker Types

Line-Type Bunker Systems

Bunker is a relatively recent addition to the English language to describe a military structure. According to the Oxford English Dictionary its is a "A military dug-out; a reinforced concrete shelter" and its first use was 13 October 1939 "A Nazi field gun hidden in a cemented 'bunker' on the Western front" (War Pictorial). The word is German in origin and was used by the Germans to describe bombproof shelters both above ground as in Hochbunker and below ground as in the Führerbunker. All the early references to its usage in the Oxford English Dictionary are to German fortifications. By 1947 the word was familiar enough in English that Hugh Trevor-Roper in The Last Days of Hitler was describing Hitler's underground complex near the Reich Chancellery as "Hitler's own bunker" without quotes around the word bunker.

Philip Alfred Mickelson (born June 16, 1970) is an American professional golfer. He has won four major championships and a total of 40 events on the PGA Tour. He has reached a career high world ranking of 2nd in multiple years. He is nicknamed "Lefty" for his left-handed swing, even though he is otherwise right-handed. Mickelson was elected into the World Golf Hall of Fame in November 2011 and was inducted in May 2012.

Mickelson was born in San Diego, California, to parents Phil Mickelson Sr. (an airline pilot and former naval aviator) and Mary Mickelson. He was raised there and in Scottsdale, Arizona. Although right-handed otherwise, he plays golf left-handed, as he learned by watching his right-handed father swing and mirroring it. Mickelson began golf under his father's instruction before starting school. Phil Sr.'s work schedule as a commercial pilot allowed them to play together several times a week and an extensive practice area in their San Diego backyard allowed young Phil to hone his creative short game. Mickelson graduated from the University of San Diego High School in 1988.