Authorities Release Image of Suspect in NYC Bombings

Trump: Attacks Like This Could Happen 'More & More' Across the Country

Gorka: This Is 'Guerrilla Warfare' & We've Seen It All Before

The bomb detonated in New York City Saturday and another a few blocks away that didn't go off were shrapnel-filled pressure cooker bombs, similar to those used in recent attacks in the U.S. and abroad.

Trace Gallagher reported this afternoon that pressure cooker bombs are used by terrorists because they're easy to customize and highly dangerous.

Tamerlan and Dzhokhar Tsarnaev admitted that they learned how to make the devices used in the 2013 Boston Marathon bombing simply by following the blueprints in Al Qaeda's "Inspire" magazine, Gallagher reported.

He also noted that one of the deadliest pressure cooker bombs ever was used at a restaurant in Afghanistan in February 2013, killing five people.

In July 2011, almost two years after the Ft. Hood shooting, an Army private who was stationed at the base, Naser Abdo, was arrested for plotting to blow up a restaurant frequented by military personnel, Gallagher said.

Luckily, Abdo's plot was foiled, and he later admitted that he also learned how to make pressure cooker bombs from the Al Qaeda magazine.

"And in May of 2010, one of three devices used in the attempted bombing of Times Square was a pressure cooker that was not detonated," Gallagher said.

"There have also been a few bombing attempts in Europe where police got the jump on the suspects and foiled the attacks, but also found pressure cookers and bomb-making materials at those sites as well."

Watch more above.

'Political Correctness Kills': Flynn Says We're Losing War Against Radical Islam

WATCH: College Student Told Trump Hat Is 'Hate Language'

Pence: Dick Cheney is My Vice Presidential Role Model

Shocking Ambush: Suspect Shoots West Philly Cop Several Times, Kills Civilian