Rule 5b. Never use single quotation marks in sentences like the previous three. Incorrect: I had a visit from my 'friend' the tax man. The single quotation marks in the above sentence are intended to send a message to the reader that friend is being used in a special way: in this case, sarcastically. Avoid this invalid usage.
Why do jets leave a white trail in the sky? Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas.
Tomorrow, the last US Airways flight will depart, completing a major milestone in the carrier's integration with American Airlines. Here's how to track the last flights, which will fly from hub to hub as special flight US1939 in honor of US Airways founding year.lightradar24.com-Live flight tracker!Flightradar24 is the best live flight tracker that shows air traffic in real time.