11.   A bill before Congress would increase the pay for park police and the uniformed Secret Service.

12.   At least one witness said the man had threatened park police earlier.

13.   For park lovers long accustomed to being shooed away by poker-faced park police, the measure is nothing short of a revolution.

14.   His motive was unclear, though park police said he put the barrel of the gun in his mouth.

15.   Hines said the two shots were fired by park police.

16.   Mulholland said park police would be reviewing security at the monument to see what could be done to prevent similar incidents in the future.

17.   The demonstrators returned to nearby Lafayette Square to avoid arrest by a growing force of park police.

18.   Varner said he saw a man charging across the street onto the sidewalk with a knife, about nine inches long, running toward park police.

19.   To tighten security, park police have cracked down on the bands of homeless people and political protestors who live in the park, park dwellers told AFP.