21.   No signs warned that losing track of the snow-covered trail could be treacherous.

22.   Newly posted signs warn off trespassers and ban any new burials.

23.   Ominous bright yellow and purple contamination signs warn people to keep out.

24.   On a wooden and wire gate, a paper sign warned visitors that all packages will be searched prior to entering.

25.   On the banks of the Maili Suu River where radioactive waste from the plant is stored signs warn of the hazard at one of the sites in the area.

26.   Now, spray-painted signs warn rescue workers they must wear respirators on the site.

27.   Signs at trailheads warn people that bears are dangerous.

28.   Signs warn of hunters in the hills.

29.   Signs warn passengers to be wary of boxes and briefcases left behind.

30.   Signs warn, however, against eating fish from its waters.