Development: US President Barack Obama will meet his Cuban peer, Raúl Castro, at the margins of the United Nations General Assembly tomorrow (29 September), White House officials have confirmed. Significance: This will be the second time that the two leaders will formally meet, having first met at the Summit of the Americas in Panama in April. Obama also telephoned Castro ahead of Pope Francis’s recent trip to Cuba, which coincided with further US regulatory changes to facilitate travel and trade with Cuba. The White House is continuing to chip away at the US embargo, while urging Congress to approve its…