Video explains developments in Yemen as of Feb 19th.
Yemen: Protester killed in Sanaa clashes
19 February 2011
Last updated at 12:45 ET
Riot police in Yemen have shot dead a protester and injured five others when they opened fire on thousands demonstrating in the streets of the capital, Sanaa.
Protesters began marching early in the morning, making their way to the Ministry of Justice, demanding President Ali Abdullah Saleh leave office immediately.