could be gone in just a short time. >> we don't know what we're going to do. i mean, it's really scary. >> the flow rate has been very inconsistent advancing from as fast as 20 yards per hour to about 2 yards per hour. security is getting tighter at federal government buildings. homeland security chief jeh johnson said the specific changes will vary by location. his department protects more than 9,500 facilities around the country. the move was triggered by repeated calls from terrorist groups for attacks on law enforcement and government facilities. and by last week's terror attack in canada. and in canada, the soldier killed in that attack has been laid to rest. thousands of people lined the streets as his coffin passed by. corporal nathan cirillo was at the tomb of the unknown soldier when he was killed by a man who then attacked the parliament. dallas nurse amber vinson is back home after being released from ebola treatment in atlanta. she was met by her mother and fiance after the plane arrived back in dallas. before leaving atlanta she spoke emotionally about her ordeal.