Parts of downtown Dallas remain an active crime scene. With so many Dallas police officers in attendance at Tuesday's interfaith memorial service, police officers from several other North Texas police departments and the Texas Department of Public Safety were helping protect the area.
The crime scene, though, continues to shrink by the day. There are only now a few detours remaining surrounding the El Centro College buildings and parking garage.
On Sunday there were 150 FBI agents and analysts working on a crime scene that spread across a huge chunk of downtown. Tuesday afternoon NBC 5 crews spotted about 20 or agents still working there.
Many businesses are back open, but they're not exactly back to normal.
For the first time since the deadly ambush, Smile Center is open for business, technically.
"I don't know about getting much business today with the president arriving, it's kind of quiet in here," said office manager Albina Knevsky.
The lobby is quiet, and customers with appointments aren't showing up. They normally see about 10 clients a day, but they hadn't treated anyone by lunchtime.
"It's very depressing, it's almost eerily quiet here," Knevsky said.
Knevsky lost two days of pay because the crime scene street closures forced the dental practice to remain shut down. But she's not angry.
"In such an instance, you're not really thinking in those terms. You're thinking about the people who lost their lives and got hurt," she said.
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"But it is frustrating to not be able to get into the office and make those calls to clients and try and re-schedule," she added.
Downtown's Bank of America building is also back open Tuesday.
Legal secretary Christine Dudkewitz works on the 41st floor. She had a 5:45 a.m. message from her boss to head into work and said she's thankful to be back.
"It's kind of scary because you have a family to take care of and you don't know when you'll get back to work. You to have to pay your bills, get back to normal," she said. "It's kind of an unsettling feeling."
Dudkewitz added she became emotional as she entered Bank of America Plaza. She parked her car two blocks away and passed by the crime scene.
"You don't really understand the sadness until you're here," she said. "As you get to the cross streets of Main and Lamar, you can't help but cry."
Across El Centro, the Elm Street 7-Eleven clerks cleaned up broken glass and boarded up shattered windows damaged by bullets. They opened up by lunchtime.
Several other West End restaurants and businesses, however, remained closed Tuesday.
FBI agents continue to work inside and outside El Centro College, taking photos, measurements and processing evidence.
The FBI isn't saying when the building will be released back to college administrators.