Britney Spears and her manager Larry Rudolph in Vegas (11/17/06).

Federline will 'go the distance' to protect children from spears.... Kevin Federline filed for sole custody of his two young children with pop star Britney Spears because he feels she is not fit to take care of them on her own.

The former dancer counter-sued Spears one day after she filed for divorce, asking for sole physical and legal custody of children Sean Preston, 14 months and Jayden James, two months.

Federline may use Spears' series of very public parenting mishaps against her, including an incident earlier this year (06) where she drove with Sean Preston on her lap and another where she had him in his car safety seat facing the wrong way.

According to Federline's attorney Mark Vincent Kaplan, "Kevin feels he is a great parent and acting solely in the best interest of his children. He's not doing this for the money.

"Kevin is prepared to go the distance in order to protect and safeguard the children and will not be dissuaded or intimidated from the pursuit of these goals".