The recent ISIS-led attack is Paris has pushed leaders in the U.S. and abroad to look for new strategies to stop further terror-related tragedies from occurring.

Michael Morell, the former deputy director of the CIA, says that it is clearly time for new anti-terror methods to be employed.

According to CBS News, Morrell cited recent ISIS moves as proof that what the U.S. has been doing is simply not working. "We've had an ISIS affiliate in the Sinai apparently -- we don't know for sure yet -- bringing down an airliner, only the third airliner brought down by a bomb in the last quarter century. And we've had the second largest terrorist attack in Western Europe since 9/11, the largest since Madrid in 2004," bemoaned Morell.

"When you put those two things together and you put together this attempt to build an attack capability in the West, I think it's now crystal clear to us that our strategy, our policy vis-à-vis ISIS is not working and it's time to look at something else," he said.

The former CIA deputy director said that it was also time for U.S. citizens to ask themselves tough questions regarding safety and privacy. "We need to have a public debate about this," Morell said, adding that that debate was "going to be defined by what happened in Paris."

Steven Simon, a former Middle East adviser to President Obama, sees stricter borders and more surveillance as inevitable. According to The New York Times, he said, “You’re going to see several things. Tighter border controls, more intensive surveillance in the U.S. and more outreach to local communities in the hope that extremists will be fingered by their friends and family.”

Juan Carlos Zarate, a former counterterrorism adviser to former President Bush, said the putting a stop to the spread of ISIS requires various forms of action. “In the wake of the Paris, Beirut and Sinai attacks, the U.S. government and allies may now realize that there may not be time to contain this threat — and instead need to be much more aggressive in disrupting terrorists’ hold on territory, resources and the minds of Muslim youth,” explained Zarate.

Ben Rhodes, an adviser for strategic communication for President Obama, said that whatever setbacks the administration might encounter, the only way forward was to keep up a relentless vigilance.

According to CNN, he said, “The president has always been very clear this is a long-term campaign.”

"There are going to be setbacks, including tragic setbacks, like what we saw in Paris," Rhodes explained, adding, “The fact is, what we have to do is very methodically and relentlessly degrade this threat.”