The steel structure will form the basis of the 11, 000 sqm (118, 400 sq ft) column-free roof.

BBC: Aquatic Centre's wave roof lifted

Editorial writer Rapheal Reece-Harrel(ph) has used his column in the free paper Metro to exhort Mexicans to participate in response to widespread marches in the United States.

NPR: Immigration Activists Target U.S. Businesses in Mexico