Question: Vertical Horizon and Wheatus, are of which nationality?

Context articles: Live Stages
Matt Scannell
Ed Toth
Vertical circle
Wheatus
Vertical Horizon
Everything You Want (Vertical Horizon song)
David Bendeth
Duo Live
Duo (Richard Marx and Matt Scannell album)

Live Stages is a live album by Vertical Horizon, released by Rhythmic Records in early 1997, and later re-released by RCA Records.
 This album was recorded live at Ziggy's in Winston-Salem, North Carolina.
 It featured mostly songs from the band's second album, Running on Ice, (and "On the Sea" from "There and Back Again"), as well as new material.
 This was the first Vertical Horizon album to feature Scannell more prominently on electric guitar, and also the first to include drummer Ed Toth.
 Ryan Fisher played bass.
Matthew "Matt" Scannell is an American singer, guitarist, songwriter and musician.
 Scannell is the lead vocalist, lead guitarist, primary songwriter, and founding member of the alternative rock band Vertical Horizon.
Ed Toth is an American musician who currently plays drums for The Doobie Brothers.
 Toth joined the Doobies in 2005 following his departure from Vertical Horizon.
In astronomy, a vertical circle is a great circle on the celestial sphere that is perpendicular to the horizon.
 Therefore, it passes through the zenith and the nadir.
 There is a vertical circle for any given azimuth, where azimuth is the angle measured east from the north on the celestial horizon.
 The vertical circle which is on the east-west direction is called the prime vertical.
 The vertical circle which is on the north-south direction is called the Local Celestial Meridian (LCM) or Principal Vertical.
 Vertical circles are part of the horizontal coordinate system.
Wheatus is an American rock band from Northport, New York, formed in 1995.
 They are best known for their 2000 single "Teenage Dirtbag" which appeared in the movie "Loser" and the HBO miniseries "Generation Kill" and was most recently used as an acoustic opening for the anti-bully film "Bully", and Netflix Original series Girl Boss.
Vertical Horizon is an American alternative rock band formed at Georgetown University in Washington, D.C. in 1991.
 The band is best known for their 1999 hit, "Everything You Want".
 Their most recent album, "Echoes from the Underground," was released in October 2013.
"Everything You Want" is a song by American alternative rock band Vertical Horizon and the eponymous second single from their third studio album "Everything You Want".
 Released on April 4, 2000.
 The single reached the top of the "Billboard" Hot 100 after a 26-week climb on July 15 of that year.
 "Everything You Want" is Vertical Horizon's most successful single.
David Bendeth (born 17 June 1954) is a multi-platinum award-winning record producer.
 He has either Produced or Mixed albums by Paramore, Breaking Benjamin, Elvis Presley, Papa Roach, Killswitch Engage, In Flames, The Red Jumpsuit Apparatus, Hawthorne Heights, Underoath, A Day To Remember, Taking Back Sunday, Chiodos, The Almost, Vertical Horizon, SR-71, As I Lay Dying, All Time Low, Bruce Hornsby, Hedley, Kaiser Chiefs, Bring Me the Horizon, Of Mice & Men, Asking Alexandria, We Came as Romans, Coldrain, Tonight Alive, Beartooth, Young Guns, I Prevail, Sleeping with Sirens, Northlane .
Duo Live is a live album by Richard Marx (a fifth for Marx, 22nd overall) and, Vertical Horizon band member, Matt Scannell (second for Scannell, eighth overall).
 Marx and Scannell exhibit both of their acclaimed works and share lead vocals on three songs, including a never before released song.
Duo is an acoustic album by Richard Marx and Vertical Horizon vocalist Matt Scannell.
 The disc was released on May 12, 2008, exclusively through RichardMarx.com and was later made available for sale at their concerts together as well.
 Marx and Scannell exhibit both of their acclaimed works.
 Marx remade a version of "Always On Your Mind," for his 2008 album "Sundown".
 The disc is predominantly done on acoustic guitar aside from the track "Give You Back" performed on piano.