Activists protest Dow-sponsored Olympic wrap

Activists calling for Dow Chemical to be dropped as a sponsor of the 2012 Games have unfurled a giant protest banner in front of the Olympic stadium, whose wrapper is funded by the US-based company. Dow is the parent company of Union Carbide, whose pesticide plant leaked gas into the central city of Bhopal in 1984, killing tens of thousands of people. Duration: 01:18