And here is an April 2 update on Tikrit with reports from fighters inside the city.
http://www.nytimes.com/2015/04/03/world/middleeast/isis-forces-pushed-out-of-tikrit.html
> many of the Shiite militiamen involved in the fight say the international coalitions air campaign actually impeded their victory even though beforehand they had spent weeks in a stalemate with militants holed up in Tikrit.