'Based on a falsehood': Panama president denies US claim on canal fees - From the ground in Panama: Secretary Rubio's trip to Panama City - Rubio meets Panama's leader to push Trump demand for canal - Rubio meets with Panamanian president to discuss Panama Canal, migrant crossings - Rubio meets with Panamanian president amid Trump's Panama Canal push - Panama's president says there will be no negotiation about ownership of canal - Panama's president calls Trump's Chinese canal claim 'nonsense'