1.   And walking has become a new experience what with the ground now a fuzzy haze.

2.   Even walking becomes a competitive act.

3.   Walking becomes difficult.

4.   Walking has become too dangerous.

5.   Walking became a chore, with most people just skating down inclines.

6.   Walking becomes much like roller skating.

7.   Before undergoing surgery, walking had become difficult.

8.   With public transportation shut down and major bridges and tunnels closed to traffic, walking became the only way to get anywhere.

9.   With limited means of transportation, walking has become a routine part of life for most North Koreans.