During the weeks when the attacks occurred, public fear mounted of the apparently random shootings, especially in relation to such sites as service stations and parking lots of large stores, where many had taken place. People pumping gasoline at gas stations kept moving, hoping to present a smaller target. Lisa Notgrass of Lake Jackson, Texas, recommended to media that gas stations put up tarps around the awnings over the fuel pumps, so people would feel safer, and some did. Also, many people with access tried to fuel their vehicles at the naval base of the National Naval Medical Center in Bethesda, Maryland, as they felt it was safer inside the guarded fence. Government buildings such as the White House, U.S. Capitol, and the Supreme Court building, and memorial tourist attractions at the National Mall in Washington, D.C. also received heightened security. For the duration of the attacks, United States Senate pages received a driven police escort to and from the United States Capitol every day and were not allowed to leave their residence hall for any reason except work. Drivers of white vans and box trucks were viewed with suspicion from other motorists as initial media reports indicated the suspect may be driving such a vehicle.