Effort to defeat ISIS will take time and go beyond this administration , official says . ` ` We will not allow our enemies to hold us back , '' the Sotloff family says . The U.S. policy is to ` ` terrorism and destroy '' ISIS , U.S. defense secretary says . ISIS video released Tuesday - second beheading of a U.S. journalist in two weeks .
Effort to defeat ISIS will take time and go beyond this administration , official says . `` We will not allow our enemies to hold us hostage , '' the Sotloff family says . The U.S. goal is to `` degrade and destroy '' ISIS , U.S. defense secretary says . ISIS video released Tuesday shows second beheading of a U.S. journalist in two weeks .