Question: What are the names of the current members of  American heavy metal band who wrote the music for  Hurt Locker The Musical? 

full_context: Document 1: A Very StarKid Album: A Very StarKid Album contains several songs from the musical "A Very Potter Sequel", sequel to the Harry Potter parody musical "A Very Potter Musical", produced by StarKid Productions with music and lyrics by Darren Criss (who also starred in both musicals as Harry Potter), and book by Matt Lang, Nick Lang, and Brian Holden. The album features seven of the twelve songs from "A Very Potter Sequel" as well as tracks from others members of the group. Songs from the musical that were absent from the album were later released as the "A Very Potter Sequel" soundtrack. The album was released digitally through iTunes and Amazon.com on July 22, 2010, and was made available on the StarKid Productions Bandcamp page on August 3, 2010. The album reached No. 14 on the iTunes Pop Charts and No. 27 out of all Top Albums officially topping Lady Gaga (#29) and "Glee" (#31) on the charts. The album also reached No. 19 on Top Compilations.
Document 2: Hair (musical): Hair: The American Tribal Love-Rock Musical is a rock musical with a book and lyrics by James Rado and Gerome Ragni and music by Galt MacDermot. A product of the hippie counterculture and sexual revolution of the late 1960s, several of its songs became anthems of the anti-Vietnam War peace movement. The musical's profanity, its depiction of the use of illegal drugs, its treatment of sexuality, its irreverence for the American flag, and its nude scene caused much comment and controversy. The musical broke new ground in musical theatre by defining the genre of "rock musical", using a racially integrated cast, and inviting the audience onstage for a "Be-In" finale.
Document 3: Metallica discography: The following is the discography of Metallica, a Los Angeles-based metal band formed in 1981 by James Hetfield (lead vocals, rhythm guitar) and Lars Ulrich (drums). After several bassist and lead guitarist changes, the band settled on Cliff Burton and Kirk Hammett, respectively. Metallica started playing locally, releasing their first widely circulated demo, "No Life 'til Leather", in 1982. The demo caught the attention of Johny Zazula, who signed Metallica to Megaforce Records. The band released "Kill 'Em All" in 1983, and the following year they released "Ride the Lightning". After "Ride the Lightning" was released, Metallica left Megaforce and signed to Elektra Records. In March 1986, the band released its third studio album, "Master of Puppets", which was Metallica's first album to be certified gold by the Recording Industry Association of America (RIAA). While promoting the album, Burton was killed in a bus accident. Jason Newsted was hired as a replacement. The band's first release to feature the new member was "," and then followed by "...And Justice for All" in August 1988, which peaked at number six on the "Billboard" 200.
Document 4: The Magic Show: The Magic Show is a one-act musical with music and lyrics by Stephen Schwartz and a book by Bob Randall. It starred magician Doug Henning. Produced by Edgar Lansbury, it opened on May 28, 1974 at the Cort Theatre in Manhattan, and ran for 1,920 performances, closing on December 31, 1978. Henning was nominated for the Tony Award for Best Featured Actor in a Musical and director Grover Dale was nominated for the Tony Award for Best Direction of a Musical.
Document 5: List of songs performed live by Metallica: Metallica is an American heavy metal band from Los Angeles, California. The band was founded in 1981 by drummer Lars Ulrich and vocalist and rhythm guitarist James Hetfield, alongside lead guitarist Dave Mustaine and bassist Ron McGovney. Mustaine and McGovney were later replaced by Kirk Hammett and Cliff Burton, respectively. Burton died in 1986 and was replaced by Jason Newsted, who remained in the band until 2001, before Robert Trujillo joined. Since its first live concert on March 14, 1982, Metallica has played 2,012 official shows. As of their show on September 16, 2017, the band has performed 164 songs and medleys live.
Document 6: Wig in a Box: Wig In A Box: Songs from & Inspired by Hedwig and the Angry Inch is a charity tribute album featuring versions of songs from the musical "Hedwig and the Angry Inch". It was released in 2003 through Off Records, and proceeds benefited the Hetrick-Martin Institute, which is the home of the Harvey Milk High School, a New York City public school for gay, lesbian, bisexual, transgender and even cisgender and/or straight youth who have experienced homophobic and gender identity discrimination and violence at home and/or in other public schools and who are at risk of not completing their secondary education.
Document 7: List of Metallica concert tours: Metallica is an American heavy metal band, founded in 1981 by drummer Lars Ulrich and rhythm guitarist James Hetfield. Aside from Ulrich, the original lineup for some of the 1982 concerts included James Hetfield (rhythm guitar and lead vocals), Dave Mustaine (lead guitar and backing vocals) and Ron McGovney (bass guitar). Cliff Burton replaced McGovney in 1982 and played with the band until his death in 1986. After his death, bassists Jason Newsted (1986–2001), and Robert Trujillo (since 2003) were recruited in the band. While the lead guitarist role was taken by Kirk Hammett (since 1983) after Dave Mustaine got fired from the band.
Document 8: Kirk Hammett: Kirk Lee Hammett (born November 18, 1962) is an American musician who has been lead guitarist and a contributing songwriter for the heavy metal band Metallica since 1983. Before joining Metallica he formed and named the band Exodus. In 2003, Hammett was ranked 11th on "Rolling Stone"<nowiki>'</nowiki>s list of The 100 Greatest Guitarists of All Time. In 2009, Hammett was ranked number 15 in Joel McIver's book "The 100 Greatest Metal Guitarists".
Document 9: Falsettos: Falsettos is a musical with a book by James Lapine and William Finn, and music and lyrics by Finn. The musical consists of "March of the Falsettos" and "Falsettoland", the last two installments in one trio of one-act Off-Broadway musicals (the first was "In Trousers"). The story involves Marvin, his ex-wife Trina, his psychiatrist Mendel, his son Jason, his gay lover Whizzer Brown, and his neighbors Cordelia and Dr. Charlotte. The musical premiered on Broadway in 1992 and was nominated for seven Tony Awards, of which it won Best Book of a Musical and Best Original Score. It was revived briefly on Broadway in 2016, and the revival performance was nominated for five Tony Awards.
Document 10: James Hetfield: James Alan Hetfield (born August 3, 1963) is an American musician, singer, and songwriter known for being the co-founder, lead vocalist, rhythm guitarist, and main songwriter for the American heavy metal band Metallica. Hetfield is mainly known for his intricate rhythm playing, but occasionally performs lead guitar duties and solos, both live and in the studio. Hetfield co-founded Metallica in October 1981 after answering a classified advertisement by drummer Lars Ulrich in the Los Angeles newspaper "The Recycler". Metallica has won nine Grammy Awards and released ten studio albums, three live albums, four extended plays and 24 singles.
Document 11: Hurt Locker (musical): Hurt Locker The Musical is a fictional musical in the 2014 Broadway premiere production of "Hedwig and the Angry Inch". In the Broadway performance of "Hedwig and the Angry Inch" the musical opens with Hedwig explaining that the musical only ran for a single night before closing during intermission, and that she has convinced a producer to let her perform in what would otherwise be an empty stage. Fake Playbills for the musical are used as props and are found scattered on the floor of the Belasco Theatre and contains advertisements for other fake musicals based on feature films such as "Gravity on Ice", "Container Store: The Musical", "The Entire Bible", and "SoulCycle on Broadway". The Playbills, which describe the musical as having "explosions, negligible storytelling, camouflage and tits", also state that the musical's cast included actors such as Taye Diggs (who would go on to play the role of Hedwig in the summer of 2015) and that the music was written by Metallica and Stephen R. Schwartz, which is the real name of "Hedwig" songwriter Stephen Trask.
Document 12: Toy Story: The Musical: Toy Story: The Musical was a rock musical inspired by Disney·Pixar's "Toy Story". The show was created by Walt Disney Creative Entertainment for Disney Cruise Line, replacing the earlier "Hercules: The Muse-Ical". After a year of pre-production and workshops, it had a soft premiere on board the Disney Wonder in March 2008, with an official opening on April 10, 2008. The show is performed in the Walt Disney Theatre, the grand showplace located on Deck 4.
Document 13: List of songs recorded by Metallica: Metallica is an American heavy metal band formed in Los Angeles, California in 1981. The band released its debut album "Kill 'Em All" in 1983, which credited songwriting between frontman James Hetfield, drummer Lars Ulrich and guitarist Dave Mustaine, who had left before the album was recorded (bassist Cliff Burton was credited for the bass solo "(Anesthesia) – Pulling Teeth"). On the 1984 follow-up "Ride the Lightning", Burton received more songwriting credits and Mustaine's replacement Kirk Hammett was also co-credited on four songs. "Master of Puppets", released in 1986, was the last album to feature Burton, who died in a bus accident later that year.
Document 14: Rock musical: A rock musical is a musical theatre work with rock music. The genre of rock musical may overlap somewhat with album musicals, concept albums and song cycles, as they sometimes tell a story through the rock music, and some album musicals and concept albums become rock musicals. Notable examples of rock musicals include "Next to Normal", "Spring Awakening", "Rent", "Grease", and "Hair". The Who's "Tommy" and other rock operas are sometimes presented on stage as a musical.
Document 15: Metallica: Metallica is an American heavy metal band based in San Rafael, California. The band was formed in 1981 in Los Angeles when vocalist/guitarist James Hetfield responded to an advertisement posted by drummer Lars Ulrich in a local newspaper. Metallica's current lineup comprises founding members Hetfield and Ulrich, longtime lead guitarist Kirk Hammett, and bassist Robert Trujillo. Guitarist Dave Mustaine (who went on to form Megadeth) and bassists Ron McGovney, Cliff Burton, and Jason Newsted are also former members of the band.
ground_truth: Hetfield and Ulrich, longtime lead guitarist Kirk Hammett, and bassist Robert Trujillo.