question

Go after and cover:
1.- Liza is a journalist who goes after stories on technology for Business 2000 magazine.

<em>if you wanted to use 'go' it would be more proper to say...Lisa is a journalist who will go after..</em>

2.-It took a lot of courage for those reporters to cover the story about drug smugglers.

Correct, also you could put 'the' before drug smugglers

Ex:  It took a lot of courage for those reporters to cover the story about the drug smugglers.