The fight against Islamic State has shifted to ¡°annihilation tactics¡± to stop potential terrorists who¡¯ve flocked to places such as Iraq and Syria from returning to their home countries to wreak havoc, Defense Secretary James Mattis said Sunday.

In his first interview on a Sunday talk show since joining the Trump administration in January, Mattis provided details of the tactical shift he announced at the Pentagon on May 19.

¡°We have already shifted from attrition tactics where we shove them from one position to another in Iraq and Syria,¡± Mattis said on ¡°Face the Nation¡± on CBS. ¡°Our intention is that the foreign fighters do not survive the fight to return home to North Africa, to Europe, to America, to Asia, to Africa.¡±