Sad news about fatal traffic collision during this week’s Nuclear Summit.

From the American Association for the Advancement of Science:

Employees at the American Association for the Advancement of Science (AAAS) and its journal Science today expressed shock and deep sadness at the tragic loss of the gifted science journalist and artist, Constance Holden.

Holden, 68, a veteran journalist and painter affectionately known to friends and colleagues as “Tancy,” apparently had just left the AAAS headquarters building on her bicycle around 6:00 p.m. Monday, 12 April when she was struck and killed by a truck providing support for the Nuclear Security Summit taking place in downtown Washington, D.C.

The accident that claimed Holden’s life took place at the intersection of New York Avenue and 12th Street, N.W., Washington, D.C.

Read more on how “Summit security fails to protect” at Greater Greater Washington.