I want to know the answer to the following question:
When were the new plans of the airport revealed?
All the background I'm provided with is that "During his annual state-of-the-nation address on September 2, 2014, President of Mexico Enrique Peña Nieto unveiled plans for a new international airport to ease the city's notorious air traffic congestion, tentatively slated for a 2018 opening.". Is that enough to answer the question?
Answer: yes