The EC announced that it would review the proposed alliance between British Airways (BA), American Airlines and Iberia. The parties also filed for worldwide antitrust immunity from the US Department of Transportation. BA and American Airlines previously abandoned alliance plans in 1997 and 2001 after regulators required them to divest a large number of take-off and landing slots at Heathrow in order to limit the parties’ combined market power. The parties argue that this time divestments should not be required given the “open skies” agreement that has liberalised transatlantic flights, as well as the immunity recently granted by regulators to the SkyTeam alliance between Delta, Northwest and Air France-KLM.