US Not as Vigilant as Europe on Terror: Military Analyst

The deadly Boston Marathon bombings won't "change the way we live" in the United States, said Jack Jacobs, a retired U.S. Army colonel who received the Medal of Honor.

"This is not like 9/11. There is not going to be any lasting imprint," the MSNBC military analyst told CNBC's "Squawk Box" on Tuesday. "We're not going to stop permitting people to congregate in public."

(Read More: Full Coverage of Boston Bombing)

At a news conference Tuesday morning, Boston Police commissioner Ed Davis said two sweeps for explosives before the blasts turned up nothing, adding there's no evidence the bombs were located in trash cans as has been speculated.

But Jacobs told CNBC that removing trash cans during public events is a good idea. "In the U.K., there are no public garbage cans. In London, there are no garbage cans into which you can put bombs like this. We are relaxed about this. We haven't had attacks like they have in Europe."

He described the difficulty that security personnel face in stopping an attack of this nature. "There's no way you'll be able to contain any event like this, for example, or the Super Bowl. There is no way you'll be able to swarm the entire area with bomb sniffing dogs all the time."

(Read More: Obama Says Boston Bombing Being Treated as Act of Terror)

While there's been no official statement on who carried out this attack, Jacobs said he's doesn't think it was international terrorism because "there wasn't the kind of chatter on the air waves that we've seen before, no claim of responsibility." He added that he's leaning toward some sort of domestic suspect or suspects.

By CNBC's Matthew J. Belvedere; Follow him on Twitter @Matt_SquawkCNBC