I have had two questions for months in regard to 9/11.
1. How did the terrorists know specifically how to locate and fly into the Pentagon and WTC? If they were above the clouds and only had minimal flight training, how could they truly even locate DC or NYC from hundreds of miles away?
2. I am puzzled about all of the reports of the cell phone calls from the PA flight that crashed. I have frequently looked at my ATT Wireless cellphone while in the air, and it always reads "No service".

Any opinions?