This mission...

[Cortana]

does anyone know how to do this? ive just seen these "the flood" guys for the first time, and then theres this bridge that keeps reappearing and disappearing. i got past it but i dont know where to go next

ps its the mission after the halo control room

 

[Zaku]

You could try reading all about it on this site right here.

http://guides.ign.com/guides/15922/page_6.html

 

[BigDix]

agreed

i beat the game n all but this was the most hard-to-get-around levels took me like an hr n a half the first time to figure it out lol (least favorite lvl)

 

[Cortana]

actually i got past it like a day after i posted this, but the library mission is quite difficult. im on mission 8 so...i'll check that site