9/11 opera Between Worlds envisages what happened inside the towers

We all remember where we were on 9/11. 

USA News The planes that flew into the twin towers of the World Trade Center blew a hole in the heart of the world. That day it seemed as if optimism, decency, empathy, love, were confronted and defeated by violence, atrocity, agony and death. 

Now, nearly 14 years later, new towers are rising by the site of the tragedy. But how has art processed the event? There have been novels, plays, countless documentaries, feature films, poems and even a strip cartoon returning to that day. 

A brief first wave of cinematic responses has included Paul Greengrass's 2006 fiction United 93, while documentary has flourished more readily, the testimony of those who were there proving overwhelmingly potent. 

From Don DeLillo's Falling Man to Jonathan Safran Foer's Incredibly Loud and Extremely Close, literature has mostly concerned itself with aftermaths and echoes, using the day itself as a catalyst. As far as I know, only Frederic Beigbeder's 2004 novel Windows on the World has imagined what happened inside the towers.