Reagan National Airport is reached directly via the Metrorail station adjacent to Terminal B/C. Servicing an estimated 20 million passengers annually, Reagan National is the closest airport to the D.C.
BLUE OR GREY The called Blue or Grey Border Collie is due to the presence of a dilute gene, so the deepness of black color is blended, to bluish, slate or dark grey. As well as it happens with other coat colors, the differences are easily seen on puppies (better than on adults, whose coats gets darker).
Collie Color: The two base colors in collies are sable and black & tan. Most of us know, that in collies, sable is dominant and tri-color recessive. A puppy inherits one color allele from each parent. An allele is an alternate form of a gene. Therefore, if a collie inherits a dominant sable allele from each parent, he/she is a pure for sable (homozygous for sable). On the other hand, if a recessive black & tan color allele is contributed by each parent, the collie will be a tri-color (homozygous for black & tan).