This is also old, but interesting...
From 9/11 Anomalies
What happened at 8:36am on 9/11/01?
American Airlines Flight 11 and United Airlines Flight 175 were the two airplanes that hit the World Trade Center Towers, on September 11th, 2001. The 9/11 Commission Report published the flight paths of both airplanes. The flight paths originate from Boston, and cross paths once before their paths meet again in New York City.
When comparing the flight paths, it shows the unique location both planes passed on their way to New York City...
Directly From USA Today:
The two hijacked jets that demolished the World Trade Center nearly crashed into each other while heading to their target, according to a Federal Aviation Administration employee at a regional control center. “The two aircraft got too close to each other down by Stewart” International Airport in New Windsor, N.Y., about 55 miles north of New York City, the employee told The Telegraph of Nashua.