NEW : Acting GSA head promises immediate action to maintain `` faith in our services '' GSA head Martha Johnson resigned Monday over agency spending . A government report cited GSA 's spending $ 822,000 on a training conference . The Washington Post reported that the event was held at an undisclosed location and cost taxpayers more than $120,000.
NEW : Acting GSA head promises immediate action to maintain `` faith in our services '' GSA head Martha Johnson resigned Monday over agency spending . A government report cited GSA 's spending $ 822,000 on a training conference . A House panel plans hearings ; its chairman says , `` This is just the tip of the iceberg ''