Question: Which high energy particle collider was completed first, the Tevatron or the Large Hadron Collider? 
Context: Decay is a 2012 horror film by Luke Thompson (of the University of Manchester), set at the Large Hadron Collider in Switzerland.  The movie was created on a budget of $3,225 and was filmed over a period of two years by Thompson and his fellow physicists.  The film was released online for free under the Creative Commons CC BY-NC license, shareable and remixable.  "Decay" was premiered on 29 November 2012 and centres on the idea of the Large Hadron Collider transforming scientists into zombies. The High Luminosity Large Hadron Collider (HL-LHC; formerly SLHC, Super Large Hadron Collider) is a proposed upgrade to the Large Hadron Collider to be made after around 15 years of operation, in 2025.  The upgrade aims at increasing the luminosity of the machine by a factor of 10, up to 10 cms, providing a better chance to see rare processes and improving statistically marginal measurements. The LHCb (standing for "Large Hadron Collider beauty") experiment is one of seven particle physics detector experiments collecting data at the Large Hadron Collider accelerator at CERN.  LHCb is a specialized b-physics experiment, that is measuring the parameters of CP violation in the interactions of b-hadrons (heavy particles containing a bottom quark).  Such studies can help to explain the Matter-Antimatter asymmetry of the Universe.  The detector is also able to perform measurements of production cross sections and electroweak physics in the forward region.  Approximately 840 people from 60 scientific institutes, representing 16 countries, form the collaboration who built and operate the detector.  As of 2014, the spokesperson for the collaboration is Giovanni Passaleva.  The experiment is located at point 8 on the LHC tunnel close to Ferney-Voltaire, France just over the border from Geneva.  The (small) MoEDAL experiment shares the same cavern. The ISR (standing for "Intersecting Storage Rings") was a particle accelerator at CERN.  It was the world's first hadron collider, and ran from 1971 to 1984, with a maximum center of mass energy of 62 GeV.  From its initial startup, the collider itself had the capability to produce particles like the J/ψ and the upsilon, as well as observable jet structure; however, the particle detector experiments were not configured to observe events with large momentum transverse to the beamline, leaving these discoveries to be made at other experiments in the mid-1970s.  Nevertheless, the construction of the ISR involved many advances in accelerator physics, including the first use of stochastic cooling, and it held the record for luminosity at a hadron collider until surpassed by the Tevatron in 2004. The LHCf ("Large Hadron Collider forward") is a special-purpose Large Hadron Collider experiment for astroparticle (cosmic ray) physics, and one of seven detectors in the LHC accelerator at CERN.  The other six are: ATLAS, ALICE, CMS, MoEDAL, TOTEM, and LHCb.  LHCf is designed to study the particles generated in the "forward" region of collisions, those almost directly in line with the colliding proton beams.  It therefore consists of two detectors, 140 m on either side of the interaction point. The Very Large Hadron Collider (VLHC) is a hypothetical future hadron collider with performance significantly beyond the Large Hadron Collider. ZZ dibosons are rare pairs of Z bosons.  They were first observed by the experiments at the Large Electron–Positron Collider (ALEPH, DELPHI, L3 and OPAL).  The first observation in a hadron collider was made by the scientists of DØ collaboration at Fermilab.  They are force-carrying particles produced in proton–antiproton collisions at the Tevatron, the world’s second highest-energy particle accelerator (after the CERN Large Hadron Collider).  The observation of the ZZ dibosons was announced at a Fermilab seminar on 30 July 2008. The Tevatron was a circular particle accelerator (now inactive, since 2011) in the United States, at the Fermi National Accelerator Laboratory (also known as "Fermilab"), just east of Batavia, Illinois, and holds the title of the second highest energy particle collider in the world, after the Large Hadron Collider (LHC) of the European Organization for Nuclear Research (CERN) near Geneva, Switzerland.  The Tevatron was a synchrotron that accelerated protons and antiprotons in a 6.86 km, or 4.26 mi, ring to energies of up to 1 TeV, hence its name.  The Tevatron was completed in 1983 at a cost of $120 million and significant upgrade investments were made in 1983–2011. Lyn Evans CBE (born Lyndon Rees Evans in 1945), is a Welsh scientist who served as the project leader of the Large Hadron Collider in Switzerland.  Based at CERN, in 2012 he became the director of the Linear Collider Collaboration, an international organisation managing development of next generation particle colliders, including the International Linear Collider and the Compact Linear Collider. The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider, most complex experimental facility ever built, and the largest single machine in the world.  It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries, as well as hundreds of universities and laboratories.  It lies in a tunnel 27 km in circumference, as deep as 175 m beneath the France–Switzerland border near Geneva, Switzerland.  Its first research run took place from March 2010 to early 2013 at an energy of 3.5 to 4 teraelectronvolts (TeV) per beam (7 to 8 TeV total), about 4 times the previous world record for a collider.  Afterwards, the accelerator was upgraded for two years.  It was restarted in early 2015 for its second research run, reaching 6.5 TeV per beam (13 TeV total, the current world record).
Answer: The Tevatron