Smoke and dust engulf much of lower Manhattan and the area around the World Trade Center tower in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS
A World Trade Center tower begins to crumble in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER IMAGES OF THE DAY) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS
A World Trade Center tower begins to crumble in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER IMAGES OF THE DAY) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS
Smoke and dust engulf much of lower Manhattan and the area around the World Trade Center in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS
Smoke and dust engulf much of lower Manhattan and the area around the World Trade Center in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS
This photo taken Sept. 11, 2001 by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act, shows smoke and ash engulfing the area around the World Trade Center in New York. (AP Photo/NYPD via ABC News, Det. Greg Semendinger) MANDATORY CREDIT
© AP | AP
This photo taken Sept. 11, 2001 by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act, shows smoke and ash engulfing the area around the World Trade Center in New York. (AP Photo/NYPD via ABC News, Det. Greg Semendinger) MANDATORY CREDIT
© AP | AP
This photo taken Sept. 11, 2001 by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act, shows smoke billowing from one of the towers of the World Trade Center in New York. (AP Photo/NYPD via ABC News, Det. Greg Semendinger) MANDATORY CREDIT
© AP | AP
This photo taken Sept. 11, 2001 by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act, shows smoke and ash engulfing the area around the World Trade Center in New York. (AP Photo/NYPD via ABC News, Det. Greg Semendinger) MANDATORY CREDIT
© AP | AP
In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News Tuesday Feb. 9, 2010, smoke and ash rise as a World Trade Center tower burns at left center, after terrorists flew two airliners into the World Trade Center towers. AP Photo/NYPD, via ABC News, Det. Greg Semendinger ) MANDATORY CREDIT
© AP | AP
In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News, Tuesday Feb. 9, 2010 smoke and ash rise above downtown high-rise buildings and engulf lower Manhattan after terrorists flew two airliners into the World Trade Center towers. AP Photo/NYPD, via ABC News, Det. Greg Semendinger ) MANDATORY CREDIT
© AP | AP
Smoke and dust engulf the area around the World Trade Center in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS
Smoke and dust engulf much of lower Manhattan and the area around the World Trade Center in New York, in this September 11, 2001 handout file photo taken by the New York City Police Department and obtained by ABC News, which claims to have obtained it under the Freedom of Information Act. REUTERS/NYPD via ABC News, Det. Greg Semendinger/Handout (UNITED STATES - Tags: DISASTER) PHOTO CAN NOT BE CROPPED. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. MANDATORY CREDIT. CLIENT USE IS LIMITED TO 72 HOURS AFTER RECEIVING PHOTO
© REUTERS | REUTERS