Alan Linton called his mother moments after a plane hit the first tower on September 11, 2001.
Sharon Linton ran to the TV in time to see another plane hit the second tower. And she knew her son - a financial analyst - was working on the 104th floor.
" I thought there was some way he'd get out," she said. "He had time to get out."
The family hired a private detective and searched New York homeless shelters. They had hoped he might have had amnesia and was wandering around the city.
Then, Alan's identification cards came in the mail. And several months after that, seven of his bones were identified at Ground Zero.
Ten years have gone by and now Alan's name -- along with 67 other Marylanders who perished - will be inscribed in a new memorial. It's being unveiled this Sunday in Baltimore.
Its centerpiece: Three steel beams pulled from the wreckage of the North Tower. Now these families will have a place to go - to remember.
"I think it's important to remember and not just because it's our son," Linton said. "We need to remember that there are people out there who want to harm us. That's why these memorials are good."