seen in the last two years. >> near philadelphia, one hospital has a triage tent outside to treat patients with flu symptoms. tamiflu is in high demand and reportedly in short supply in parts of texas. your best defense against the flu -- roll up your sleeve. >> the vaccine this year is a good vaccine that it does match well to flu types in the community. >> but given the strength and the speed of transmission, health official stas window to get the flu shot you have been avoiding is closing fast. bret >> bret: wash your hands. thanks. the obama administration is signaling it may decide not to keep any american troops in afghanistan after the end of the year. at issue will be central to talks between leader and president obama later this week. chief washington correspondent james rosen tonight with a story of a complex relationship. >> it's a classic alliance.