Clark Magnet High School (La Crescenta) senior Tigran Ghukasyan at the Los Angeles County Science Fair

Clark Magnet High School senior Tigran Ghukasyan, 17, talks to judges about his study on HIV and Tuberculosis at the Los Angeles County Science Fair held at the Pasadena Convention.

( Raul Roa / Staff Photographer / March 30, 2012 )

Clark Magnet High School senior Tigran Ghukasyan, 17, talks to judges about his study on HIV and Tuberculosis at the Los Angeles County Science Fair held at the Pasadena Convention.

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