Panama President and Canal Authorities Commemorate New Milestone in Canal Expansion Work. Panama President Ricardo Martinelli witnessed a new milestone at the Canal Expansion with the filling of a segment of the new access channel that will allow the transit of Post-panamax vessels between the new Locks and the Culebra Cut. Panama Canal Authority Board of Directors Chairman and Canal Affairs Minister Rómulo Roux and Panama Canal Authority Administrator Alberto Alemán Zubieta accompanied…