Question: What instrument did Shannon Leto play in his band Thirty Seconds to Mars?

full_context: Document 1: Let the Truth Be Known: Let the Truth Be Known is the debut album by hard rock supergroup Souls of We released on May 27, 2008 via the group's official website with the first 1000 copies, with blues musician Robert Johnson inspired album artwork, signed by members London LeGrand and George Lynch. The album was later released on November 4 of the same year, through Shrapnel Records, under the moniker "George Lynch's Souls of We" with new album artwork, a rearranged track listing as well the additional track "Nork 13". The album was self-produced in various studios around Los Angeles and mixed by Mudrock, who has work with bands such as Avenged Sevenfold and Godsmack.
Document 2: Thirty Seconds to Mars: Thirty Seconds to Mars (commonly stylized as 30 Seconds to Mars) is an American rock band from Los Angeles, California, formed in 1998. The band consists of Jared Leto (lead vocals, guitar, bass, keyboards), Shannon Leto (drums, percussion) and Tomo Miličević (lead guitar, bass, violin, keyboards, other instruments).
Document 3: Walk on Water (Thirty Seconds to Mars song): "Walk on Water" is a song recorded by American rock band Thirty Seconds to Mars, featured on their upcoming fifth studio album. It was written by lead vocalist Jared Leto and drummer Shannon Leto, and recorded at the International Centre for the Advancement of the Arts and Sciences of Sound in Los Angeles, California. "Walk on Water" was released on August 22, 2017 through Interscope Records, as the lead single from the album.
Document 4: 30 Seconds to Mars (album): 30 Seconds to Mars is the debut studio album by American rock band Thirty Seconds to Mars. It was first released on August 27, 2002, by Immortal Records and distributed by Virgin Records. The album was produced by Bob Ezrin, Brian Virtue, and Thirty Seconds to Mars, and was recorded in rural Wyoming during 2001 and early 2002. It had been in the works for a couple of years, with lead vocalist Jared Leto writing the majority of the songs.
Document 5: Thirty Seconds to Mars discography: American rock band Thirty Seconds to Mars has released four studio albums, three extended plays, fourteen singles, four promotional singles, one video album and thirteen music videos. The band was formed in Los Angeles, California, in 1998 by brothers Jared Leto and Shannon Leto, with Tomo Miličević joining the band later. The band's debut album, "30 Seconds to Mars", was released through Immortal and Virgin Records in August 2002 and peaked at number 107 on the US "Billboard" 200 and number one on the US Top Heatseekers, selling more than two million copies worldwide as of March 2011. The album produced two singles, "Capricorn (A Brand New Name)" and "Edge of the Earth".
Document 6: Conquistador (Thirty Seconds to Mars song): "Conquistador" is a song by American rock band Thirty Seconds to Mars, featured on their fourth studio album "Love, Lust, Faith and Dreams" (2013). Written by lead vocalist Jared Leto, who also produced the song with Steve Lillywhite, "Conquistador" features combative lyrics and call-and-response verses. Described as the "wild child" of the album, it is an alternative rock song with influences and elements from electronica. Thirty Seconds to Mars premiered the song on Vevo on May 2, 2013, two weeks before the album's release.
Document 7: Capricorn (A Brand New Name): "Capricorn (A Brand New Name)" is the debut song by American rock band Thirty Seconds to Mars. The song was released by Immortal Records on July 23, 2002, as the lead single from the band's self-titled debut album. The song was written by Jared Leto and was produced by Bob Ezrin, Brian Virtue and 30 Seconds to Mars. According to Jared Leto, the song is about a desire for renewal. "Capricorn (A Brand New Name)" first appearance was on the compilation "Rock Tune Up #249" released by The Album Network on April 5, 2002.
Document 8: Kings and Queens (Thirty Seconds to Mars song): "Kings and Queens" is a song by American rock band Thirty Seconds to Mars, featured on their third studio album "This Is War" (2009). Written by lead vocalist Jared Leto across the United States and South Africa, the track was produced by Flood, Steve Lillywhite and Thirty Seconds to Mars. According to Leto, the lyrics of "Kings and Queens" explore the triumphant feeling of human possibilities. The melody of the song contains several qualities similar to that of 1980s adult contemporary musical works and is imbued with elements of progressive rock. The song was released as the lead single from "This Is War" on October 13, 2009.
Document 9: Jared Leto: Jared Joseph Leto ( ; born December 26, 1971) is an American actor, singer, songwriter, and director. After starting his career with television appearances in the early 1990s, Leto achieved recognition for his role as Jordan Catalano on the television series "My So-Called Life" (1994). He made his film debut in "How to Make an American Quilt" (1995) and received critical praise for his performance in "Prefontaine" (1997). Leto played supporting roles in "The Thin Red Line" (1998), "Fight Club" (1999) and "American Psycho" (2000), as well as the lead role in "Urban Legend" (1998), and earned critical acclaim after portraying heroin addict Harry Goldfarb in "Requiem for a Dream" (2000). He later began focusing increasingly on his music career, returning to acting with "Panic Room" (2002), "Alexander" (2004), "Lord of War" (2005), "Lonely Hearts" (2006), "Chapter 27" (2007), and "Mr. Nobody" (2009). In 2012, he directed the documentary film "Artifact". In 2016, he played the DC Comics supervillain Joker in the DC Extended Universe film "Suicide Squad".
Document 10: Gil Sharone: Gil Sharone is an American drummer and member of the band Stolen Babies, Marilyn Manson, Team Sleep, and formerly The Dillinger Escape Plan. He was also a fill in for punk rock band +44. His twin brother is Rani Sharone, also of Stolen Babies. He is highly regarded as one of the most versatile touring/session drummers in the world.
Document 11: Shannon Leto: Shannon Leto ( ; born March 9, 1970) is an American musician and songwriter best known as the drummer of rock band Thirty Seconds to Mars. He co-founded the group in 1998 in Los Angeles, California, with his younger brother Jared. Their debut album, "30 Seconds to Mars" (2002), was released to positive reviews but only to limited success. The band achieved worldwide fame with the release of their second album "A Beautiful Lie" (2005). Their following releases, "This Is War" (2009) and "Love, Lust, Faith and Dreams" (2013), received further critical and commercial success. As of September 2014, the band has sold over 15 million albums worldwide.
Document 12: Tomo Miličević: Tomislav "Tomo" Miličević (] ; born September 3, 1979) is an American musician and record producer best known as the lead guitarist of rock band Thirty Seconds to Mars. Born in Sarajevo but raised in the United States, Miličević moved to Troy, Michigan in the early 1980s, where he became active in the local heavy metal scene and played in a number of bands, co-founding Morphic. In 2003, he joined Thirty Seconds to Mars, with whom he achieved worldwide recognition in the mid-2000s after recording the band's second album "A Beautiful Lie" (2005). Its full-length follow-ups, "This Is War" (2009) and "Love, Lust, Faith and Dreams" (2013), received further critical and commercial success.
Document 13: Shinedown: Shinedown is an American rock band from Jacksonville, Florida. Formed by Brent Smith in 2001 after the dissolution of his prior band, Smith, still under contract with record label Atlantic Records, recruited the band's original lineup of Jasin Todd as guitarist, Brad Stewart on bass, and Barry Kerch on drums. Consistent for the first two album cycles, a few lineup changes followed in the late 2000s, eventually stabilizing with Smith and Kerch, as remaining members alongside newcomers Zach Myers on guitar, and Eric Bass on bass. The group has released five studio albums: "Leave a Whisper" (2003), "Us and Them" (2005), "The Sound of Madness" (2008), "Amaryllis" (2012), and "Threat to Survival" (2015). Shinedown has sold more than ten million records worldwide, and has had 11 number one singles on the "Billboard" Mainstream Rock charts, the third most of all-time, behind Van Halen and Three Days Grace.
Document 14: Let It Beat: Let It Beat is the second studio album by American rapper Shwayze. It was first announced by Cisco Adler on February 4, 2009, via his Myspace page. He also confirmed the song "Make A Lil Love" in that blog post. A few days later he posted another blog update, which confirmed the track "Livin' It Up," It also confirmed guest appearances from The Knux, and Tabi Bonney. On May 8, 2009 Cisco announced that the album is entitled Let It Beat, and was currently being mixed and mastered. Although Shwayze's previous debut album only had one guest appearance, this album has guest appearances from The Knux, Tabi Bonney, and Snoop Dogg. Darryl Jenifer of Bad Brains plays bass on a track called "Crazy For You," and Ric Ocasek of The Cars plays guitar on the same track. Roy Bittan the pianist of Bruce Springsteen & The E Street Band plays piano on the track Heart and Soul. The first single, "Get U Home" was released on June 28.
Document 15: List of songs recorded by Thirty Seconds to Mars: American rock band Thirty Seconds to Mars has recorded material for four studio albums. The band was formed in Los Angeles, California, in 1998 by brothers Jared and Shannon Leto. The duo later expanded to a four-piece when they added guitarist Solon Bixler and bassist Matt Wachter to the line-up. After signing a contract with record label Immortal Records in 1998, the band began to work with producers Bob Ezrin and Brian Virtue on their debut album, "30 Seconds to Mars", which was released in August 2002. The album produced two singles, "Capricorn (A Brand New Name)" and "Edge of the Earth". In early 2003, Bixler left the band due to issues primarily related to touring and was replaced by Tomo Miličević. Thirty Seconds to Mars released their second studio album, "A Beautiful Lie", in August 2005. The record, produced by Josh Abraham, was preceded by the single "Attack" and spawned two Kerrang! Award-winning singles, "The Kill" and "From Yesterday". The album's title track, "A Beautiful Lie", was released as the fourth single in selected territories. "Hunter", a song originally performed by Björk, was covered by the band and added to the track listing of the album. In March 2007, Wachter left the group to spend more time with his family and was replaced by Tim Kelleher, performing live only.
ground_truth: drums, percussion