Border Patrol

"I saw that you guys are speaking Spanish, which is very unheard of up here," an agent told two women in a convenience store. The two friends were born in California and Texas.

The troops are likely to be active-duty Army personnel. As U.S. troops are prohibited from performing law enforcement activities within the United States, they will be in support roles only.

The Department of Homeland Security says such demands aren't routine and represent a fraction of those entering the country.