Guaiac-based fecal occult blood test (gFOBT) One way to test for colorectal cancer is to look for occult (hidden) blood in stool. The idea behind this test is that blood vessels in larger colorectal polyps or cancers are often fragile and easily damaged by the passage of stool.
How far to book in advance: Seven weeks for domestic flights. Book 11 to 12 weeks out for international flights. The worst day to buy: Within 11 days of your flight. One day before the flight was the absolute worst. The best fares for Thanksgiving: For Thanksgiving 2012, the best day to buy was, on average, 96 days (about 14 weeks) before the flight. The bottom line: Do your homework before booking any flight, and make sure you've got the right tools to set yourself up for the best fares.
Tuesday used to be the best day to buy plane tickets, but not anymore. Read these travel trend updates before you book your next vacation. The Best Day of the Week to Buy Plane Tickets Is No Longer Tuesday Didn't get a vacation in last year? Take two this year because prices are better. than. ever.