Kenyans will be heading to the polls on March 4, in the first general election since 2007. More than a thousand people were killed that year in post-election violence. There are fears this year will be no different. That's partly because of a controversial presidential candidate, Uhuru Kenyata. He denies accusations of crimes against humanity for the violence six years ago. The race is expected to come down to Kenyatta and prime minister Raila Odinga, who has been in that position since he lost the disputed 2007 poll. Since then, a new constitution has come into effect. As the countdown begins, Nazanine Moshiri assesses what has changed in Kenya since 2007.