APTOPIX Navy Yard Shooting

On Tuesday, a day after a mass shooting a the Navy Yard, Washington took a moment to honor the 12 people who died.

Chuck Hagel, Martin Dempsey

A moment of silence was held in Congress, and Defense Secretary Chuck Hagel laid a wreath at the Navy Memorial. Meanwhile, the investigation into the Navy Yard shooting continues, and more is being learned about the suspected gunman.

FOX News Radio's Jared Halpern reports:

(AP Photo/FBI)
(AP Photo/FBI)

We're learning the 34-year-old may also have been suffering mental disorders, the Associated Press told by sources Aaron Alexis was treated for paranoia and was hearing voices.

Still, the FBI and local police not sure yet of a motive why Alexis entered Building 197 a little after 8:00am and opened fire on an atrium.

(Witness) "I just hid behind a brick wall. I didn't know if they were aiming at anybody or anything."

Navy Yard Shooting

While the surrounding is neighborhood is getting back to work... construction continuing, business reopening. The Navy Yard remains largely closed, only essential personnel reporting for duty.

Outside the Washington Navy Yard, Jared Halpern, FOX News Radio.

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Obama Shooting Military Building

A moment to mark the Navy Yard shootings as the U.S. Senate began its Tuesday session.

FOX News Radio's Rich Johnson reports from Washington:

After the usual prayer, a moment of silence on the Senate floor to honor the victims of Monday's Navy Yard Shootings. Democratic Leader Harry Reid saying:

(Reid) "There are no words that can possibly ease the pain of the rampage."

And... From Republican Leader Mitch McConnell:

(McConnell) "Know that your country is with you in these most difficult moments."

But, moments after both leaders commented on the Navy Yard shootings, it was back to business -- Reid blasting Republicans over yet another attempt to roll back the Affordable Care Act.

In Washington, Rich Johnson, FOX News Radio.