Flagship Program. The Flagship Program is a series of NASA missions to explore the Solar System. It is the largest and most expensive of three classes of NASA Solar System Programs, the other two being the medium-cost New Frontiers Program and the lowest-cost Discovery Program. According to NASA, the cost of a Flagship-class mission is over $1 billion. These missions will be crucial in allowing humans to reach and explore high-priority targets. These critically important targets could help establish the limits of
not flammable; not combustible or easily set on fire. Origin of nonflammable. 1960-1965. First recorded in 1960-65; non- + flammable.
The Vapors. Every work site has flammable and combustible liquids. A flammable liquid is much more volatile than a combustible one, meaning its vapors or fumes can ignite at temperatures below 100Â°F and some even lower than 32Â°F. Some common work site flammable liquids include gasoline, alcohols, lacquer thinners and some paint thinners.