Justin Gatlin returns to the Olympics

After a four-year ban from competition, American sprinter Justin Gatlin made a remarkable return to the Olympic track on Saturday. Nicknamed by fans as the “Gatlin Gun,” he finished ahead of the pack in the first heat of the 100 meter race. Gatlin, who won gold in the 2004 Athens Games, was suspended from 2006 to 2010 amid doping charges, but said he was unaware of any substance abuse. At 30 years old Gatlin will look to reclaim Olympic gold in 2012 against Usain Bolt, Yohan Blake, and Tyson Gay.

Justin Gatlin

United States' Justin Gatlin reacts after his heat in the men's 100-meters during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Lee Jin-man)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States (lane 4) starts in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Ian Walton/Getty Images)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States competes in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Streeter Lecka/Getty Images)

Justin Gatlin

United States' Justin Gatlin, right, leads in a men's 100-meter heat during the athletics in the Olympic Stadium in the Olympic Park during the 2012 Summer Olympics in London, Saturday, Aug. 4, 2012. (AP Photo/Mark J. Terrill)

Justin Gatlin

United States' Justin Gatlin crosses the finish line in a men's 100-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip )

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States competes in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Streeter Lecka/Getty Images)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States leads as he competes in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Ian Walton/Getty Images)

Justin Gatlin

Trinidad's Rondel Sorrillo, United States' Justin Gatlin and Oman's Barakat Mubarak Al-Harthi compete in a men's 100-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Anja Niedringhaus)

Justin Gatlin

United States' Justin Gatlin reacts after competing in a men's 100-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Anja Niedringhaus)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: (L-R) Rondel Sorrillo of Trinidad and Tobago, Justin Gatlin of the United States and Barakat Mubarak Al-Harthi of Oman compete in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Michael Steele/Getty Images)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States competes in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Michael Steele/Getty Images)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States (L) competes in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Stu Forster/Getty Images)

Olympics Day 8 - Athletics

LONDON, ENGLAND - AUGUST 04: Justin Gatlin of the United States competes in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England. (Photo by Streeter Lecka/Getty Images)

Justin Gatlin

Tyson Gay of USA, right, is congratulated by Justin Gatlin of USA after winning the 100m men's race at the IAF Diamond League athletics meeting at the Stade de France in Saint-Denis, north of Paris, Friday, July 6, 2012. (AP Photo/Lionel Cironneau)

Justin Gatlin

Justin Gatlin reacts after winning the men's 100m finals at the U.S. Olympic Track and Field Trials Sunday, June 24, 2012, in Eugene, Ore. (AP Photo/Marcio Jose Sanchez)

Justin Gatlin

United States' Justin Gatlin celebrates with the American flag after winning the Men's 60m final during the World Indoor Athletics Championships in Istanbul, Turkey, Saturday, March 10, 2012. . (AP Photo/Matt Dunham)

Justin Gatlin

United States' Justin Gatlin celebrates winning the Men's 60m final during the World Indoor Athletics Championships in Istanbul, Turkey, Saturday, March 10, 2012. Left is Britain's Dwain Chambers. (AP Photo/Matt Dunham)

Justin Gatlin

USA's Justin Gatlin reacts after winning in the Men's 100m, at the Padua Athletics meeting, Italy, Friday, Sept. 3, 2010. (AP Photo/Felice Calabro')

Justin Gatlin

Former Olympic champion Justin Gatlin before he competes in the men's 100 meter heat during The Bigbank Kuldliiga meeting Outdoor Track &Field Event in the northeastern town of Rakvere, about 62 miles from Tallinn, Estonia, Tuesday, Aug. 3, 2010. Eligible for reinstatement July 24, Gatlin has intensified his training, determined to write a successful final chapter to a career that has included tying a world record, an Olympic gold medal and the humiliation of being caught as a doper _ something he promised the world he'd never be. (AP Photo/Mindaugas Kulbis)

Justin Gatlin

Justin Gatlin of the United States is interviewed by journalists after the breaking the Men's 100 meter world record at the Qatar Grand Prix in Doha, Qatar Friday May 12, 2006. Gatlin, the Olympic Champion, broke the record with a time of 9.76 seconds lowering the mark of 9.77 seconds set by Jamaica's Asafa Powell in Athens in June 2005. (AP Photo/Abdul Basit)

Athens 2004 Olympic Games - Day 9 - Athletics - Men's 100m Final

Justin Gatlin of the United States wins the Men's 100m Final in a time of 9.85 at the Olympic Stadium during the Athens 2004 Olympic Games in Athens, Greece on August 22, 2004. (Photo by Allen Kee/Getty Images)

Mens 200m Medal Ceremony

ATHENS - AUGUST 27: Bronze medalist Justin Gatlin of USA celebrates on the podium during the medal ceremony of the men's 200 metre event on August 27, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Stadium in the Sports Complex in Athens, Greece. Shawn Crawford of USA came first and Bernard Williams of USA came second. (Photo by Donald Miralle/Getty Images)

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