1.  What "red flags" does Ms. Miller say terrorist Tamerlan Tsarnaev displayed that the NYPD (New York City Police Department) would have picked up on, based on the warning signs the department has used since 2007 to spot potential terrorist plots?

2.  What is the main idea of Ms. Miller's commentary?

3.  What is the NYPD's Nexus program? (see para. 14)  Should every city implement such a program?  Explain your answer.

4.  The NYPD looks for red flags that are signs of potential terrorists, then keep those people under surveillance.  What do you think of their methods? 

5.  What do you think of Ms. Miller's assertion that based on their intelligence and counterterrorism work, the NYPD could have prevented the Tsarnaev's terrorist attack?