The US GAO has published an interesting report on the Army's and Defense Logistics Agency's Approach for Awarding Contracts for the Army Combat Shirt.
The report details how the relevant agencies have moved from preferential emergency contracting towards more competitive preferential contracting for the supply of the increasing number of necessary army combat shirts.
I think that the report is particularly interesting for non-US procurement lawyers, as it describes very clearly the decision-making procedures that need to be complied with in order to resort to preferential award of government contracts, with or without competition.