Answer the question at the end by quoting:

The Dark Side of the Moon is the eighth studio album by English rock band Pink Floyd, released on 1 March 1973 by Harvest Records. The album built on ideas explored in earlier recordings and live shows, but lacks the extended instrumental excursions that characterised their earlier work. Its themes explore conflict, greed, the passage of time, and mental illness, the latter partly inspired by the deteriorating mental state of founding member and principal contributor, Syd Barrett. Developed during live performances, an early version was premiered several months before recording began; new material was recorded in two sessions in 1972 and 1973 at Abbey Road in London.
The album features metronomic sound effects during "Speak to Me", and tape loops opening "Money". Mason created a rough version of "Speak to Me" at his home, before completing it in the studio. The track serves as an overture and contains cross-fades of elements from other pieces on the album. A piano chord, replayed backwards, serves to augment the build-up of effects, which are immediately followed by the opening of "Breathe". Mason received a rare solo composing credit for "Speak to Me". The sound effects on "Money" were created by splicing together Waters' recordings of clinking coins, tearing paper, a ringing cash register, and a clicking adding machine, which were used to create a 7-beat effects loop (later adapted to four tracks in order to create a "walk around the room" effect in quadraphonic presentations of the album). At times the degree of sonic experimentation on the album required the engineers and band to operate the mixing console's faders simultaneously, in order to mix down the intricately assembled multitrack recordings of several of the songs (particularly "On the Run"). Along with the conventional rock band instrumentation, Pink Floyd added prominent synthesizers to their sound. For example, the band experimented with an EMS VCS 3 on "Brain Damage" and "Any Colour You Like", and a Synthi A on "Time" and "On the Run". They also devised and recorded unconventional sounds, such as an assistant engineer running around the studio's echo chamber (during "On the Run"), and a specially treated bass drum made to simulate a human heartbeat (during "Speak to Me", "On the Run", "Time" and "Eclipse"). This heartbeat is most prominent as the intro and the outro to the album, but it can also be heard sporadically on "Time" and "On the Run". "Time" features assorted clocks ticking, then chiming simultaneously at the start of the song, accompanied by a series of Rototoms. The recordings were initially created as a quadraphonic test by Parsons, who recorded each timepiece at an antique clock shop. Although these recordings had not been created specifically for the album, elements of this material were eventually used in the track.

Were there any particular songs they used this technique on?

are immediately followed by the opening of "Breathe

Answer the question at the end by quoting:

Duncan Lee Hunter (born May 31, 1948) is an American politician. He was a Republican member of the House of Representatives from California's 52nd, 45th and 42nd districts from 1981 to 2009. Hunter was the chairman of the House Armed Services Committee during the 108th and 109th Congress. Hunter sought the Republican Party nomination for President of the United States for 2008, but his campaign failed to attract significant voters or delegates in early primary and caucus states, and he dropped out after the Nevada Republican caucuses.
In 1980, Hunter was recruited to run for Congress in what was then the 42nd District against 18-year incumbent Democrat Lionel Van Deerlin. Hunter was initially an underdog in a district where Democrats outnumbered Republicans by almost 2 to 1. However, his attacks on Van Deerlin's record on national defense gained traction in a district dominated by military bases and personnel. Van Deerlin did not respond quickly enough, and Hunter narrowly defeated him. He was one of many Republicans swept into office from historically Democratic districts as a result of the "Reagan revolution"; Van Deerlin had been the district's only congressman since its creation in 1963. After the 1980 census, many of the more Democratic areas were cut out of Hunter's district, and he was reelected 13 more times with no substantive opposition. His district was renumbered as the 45th District in 1983 and the 52nd in 1993. In the 2006 general election, he defeated Navy veteran/minister John Rinaldi, a Democrat, and Michael Benoit, a Libertarian. Hunter was re-elected with 65 percent of the vote, a 33-point margin over Rinaldi. On March 20, 2007, Hunter announced that, as part of his presidential bid, he would not seek re-election to the House of Representatives in 2008. After his son, Duncan D. Hunter, announced his candidacy for his father's seat, the younger Hunter was recalled by the United States Marine Corps to serve in the Operation Enduring Freedom - Afghanistan. During Duncan D. Hunter's active service, his wife, Margaret Hunter, campaigned on his behalf. On June 3, 2008 Duncan D. Hunter won 72% of the Republican Primary vote and became the Republican nominee to replace his father representing the 52nd District.

did he run again when he returned from the marines?
During Duncan D. Hunter's active service, his wife, Margaret Hunter, campaigned on his behalf.