Days later the country suffered another tragedy when 31 people died and 66 were injured when an express train ploughed into a bus which had stalled on a level crossing in southern Russia.
In London, Picarro will place analyzers on the ground around the city as well as one on a bus to measure carbon emissions at road level and another on a plane to gauge emissions at higher altitudes.
An A-level student, he had planned to study architecture at university, but was killed in a racist attack at a bus stop in south east London in April 1993.