The Bengals have lost 2nd year safety Chinedum Ndukwe for as many as six weeks as he was injured today in practice.  Ndukwe was likely to be the starting strong safety for the Bengals this season based on his strong play as a rookie last season.  He played in 14 games (2 starts) last season for the Bengals and he made 44 tackles, had 2 sacks, defensed 6 passes and he had 3 interceptions.  Dexter Jackson will take back his old starting job at least at the start of the 2008 season.  Jackson played in 14 games (all starts) last season for the Bengals and he made 72 tackles, had 1/2 a sack, defensed 3 passes and intercepted 2 passes.  Jackson should be able to do a decent job for the Bengals in 2008.  He has now played in 115 games (83 starts) in his NFL career and he has made 460 tackles, has 5 sacks, has defensed 40 passes and he has 17 career interceptions.  It will be interesting to see if Jackson can hold off Ndukwe for the starting job when he’s ready to return to action in a few weeks.