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Law enforcement officials have been given high marks for their response to the bombings at the Boston Marathon. But at the same time, questions are being raised about the coordination among federal agencies handling intelligence about the suspects in the months before the attack.

There are reports that the suspects planned to head to New York City next. Also, surviving suspect Dzhokhar Tsarnaev is said to have told investigators the plot was put together only recently.

In Boston on Tuesday, residents and business owners on Boylston Street were allowed to return for the first time since last week's bombings. They returned to stores with windows blown out, restaurants with the remains of uneaten meals still sitting on tables and barricades to keep the public away from the scene.

Investigators are trying to determine if the bombing suspects acted alone. The bombs that exploded at the marathon were simple and similar to ones law enforcement officials come across on a regular basis.

Footage from privately owned surveillance cameras along the Boston Marathon route gave the FBI early clues about the bombing suspects. But the proliferation of cameras in America's big cities raises some tricky questions about the balance between security and privacy.

The suspects in the marathon bombings are also suspected of killing a MIT police officer and carjacking an SUV. The driver of that vehicle says they told him he wouldn't be hurt. He did not believe that.

Dzhokhar Tsarnaev, 19, remains hospitalized. Investigators say he has been giving them some information. But the picture of what he and his now-dead older brother, Tamerlan, allegedly did could change as the investigation continues. Dzhokhar could get the death penalty if convicted.

The decision was made under "unprecedented" circumstances, says Frank Cilluffo of George Washington University. But officials were walking a fine line — because causing massive disruption is the objective of many terrorists.

Dzhokhar Tsarnaev, who was charged today in his hospital room, is eligible for the death penalty.

Steve Inskeep talks with Boston Globe columnist Juliette Kayyem about city officials' decision to lock down Boston on Friday as law enforcement searched for a suspect in the Boston Marathon bombing. Kayyem is a former top homeland security official.