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Biden: Now Is 'One of the Most Dangerous Times in Modern History'

President Trump renewed his call for a wall along the southern U.S. border, which he called "rough territory" after a Border Patrol officer was killed Sunday.

"We're going to have the wall," the president said at a press briefing on Monday. "We need it. That's rough territory."

Two Immigration and Customs Enforcement officers were badly injured, and one later died after responding to activity at the border on Sunday. The FBI has taken over the investigation, and authorities have not released information about the incident.

The president vowed to "seek justice" and reiterated his warning that the "very dangerous" southern border is a hotspot for drug entry to the U.S.

"We're going to straighten it out," Trump said. "We have to stop the massive drug flow from pouring in."

The president offered his respects to the families of the two ICE agents, saying they were "devastated."

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