Does President Obama see ISIS as a threat to the U.S. homeland?

During a news conference today in Estonia, President Obama said his goal is to "degrade and destroy" ISIS. He then took a step back and said his goal is to ensure ISIS is "manageable." President Obama has already sent U.S. troops to Iraq to help protect U.S. personnel and embassies. Is the administration concerned that ISIS is plotting attack targeting Americans here at home? Anderson spoke with Deputy National Security Adviser Tony Blinken.

Tom Foreman looks at who is fighting for ISIS, along with the terror group's strengths and weaknesses.