["BIOGRAPHY & AUTOBIOGRAPHY \/ Memoirs","Biography & Autobiography \/ Personal Memoirs","History \/ United States \/ 21st Century","History\/United States - 21st Century","Literary Collections \/ Essays","POLITICAL SCIENCE \/ Political Freedom","Political Science\/Terrorism","Social Science\/Disasters & Disaster Relief","11 book; 911 books; september 11; 911; essay; 9","11 book;911 books;september 11;911;disasters;firefighters;ground zero;history;new york;new york city;non-fiction;terrorism;world trade center;fdny;9","11 books for kids; september 11 books for kids","11 books for kids;september 11 books for kids;september 11 books;books about 9","11 books; government; essays; short stories; 9","11 books;9","11; september 11th; twin towers; current affairs; rescue; tragedy; tragic; grief; horror; chaos; courage; wreckage; nypd; emergency; disaster; hero; heroic; american history; fireman; attack; EMT; dennis smith; smith; us history; biography; political science; biographies; 9","11;essays;biography;biographies;us history;short stories","11;september 11th;twin towers;current affairs;rescue;tragedy;tragic;grief;horror;chaos;courage;wreckage;nypd;emergency;disaster;hero;heroic;american history;fireman;attack;EMT;dennis smith;smith;9","21st Century","9","9\/11 book;911 books;september 11;911;disasters;firefighters;ground zero;history;new york;new york city;non-fiction;terrorism;world trade center;fdny;9\/11;september 11th;twin towers;current affairs;rescue;tragedy;tragic;grief;horror;chaos;courage;wreckage;nypd;emergency;disaster;hero;heroic;american history;fireman;attack;EMT;dennis smith;smith;9\/11 books;9\/11 books for kids;september 11 books for kids;september 11 books;books about 9\/11;essays;biography;biographies;us history;short stories","BIOGRAPHY & AUTOBIOGRAPHY","BIOGRAPHY & AUTOBIOGRAPHY \/ Memoirs","Building failures - New York (State) - New York","Disasters & Disaster Relief","Essays","Fire fighters - New York (State) - New York","Fire fighters;New York (State);New York.","GENERAL","General Adult","HISTORY","HISTORY \/ United States \/ 21st Century","History of the Americas","History\/United States - 21st Century","Intl Relations","LITERARY COLLECTIONS","LITERARY COLLECTIONS \/ Essays","Literary essays","Memoirs","New York (N.Y.)","Non-Fiction","POLITICAL SCIENCE \/ Political Freedom","Political Freedom","Political Science","Political Science\/Terrorism","Politics","Politics\/Intl Relations","Rescue work - New York (State) - New York","Rescue work;New York (State);New York.","September 11 Terrorist Attacks, 2001","September 11 Terrorist Attacks, 2001.","Social Science","Social Science\/Disasters & Disaster Relief","Social impact of disasters","Terrorism","United States","United States - 21st Century","World Trade Center (New York, N.Y.)","disasters; firefighters; ground zero; history; new york; new york city; non-fiction; terrorism; world trade center; fdny; 9","disasters; firefighters; ground zero; history; new york; new york city; non-fiction; terrorism; world trade center; fdny; 9\/11; september 11th; twin towers; current affairs; rescue; tragedy; tragic; grief; horror; chaos; courage; wreckage; nypd; emergency; disaster; hero; heroic; american history; fireman; attack; EMT; dennis smith; smith; us history; biography; political science; biographies; 9\/11 books; government; essays; short stories; 9\/11 book; 911 books; september 11; 911; essay; 9\/11 books for kids; september 11 books for kids","History of the Americas","Literary essays","Memoirs","Social impact of disasters"]