He also pledged to end no-bid contracts in Iraq, root out waste and abuse in entitlement programs such as Medicare and Medicaid, require every Cabinet member to scrub department budgets "line by line, " and reinstate a "pay as you go" rule from the 1990s.

CNN: Obama pledges to cut deficit in half at fiscal summit

At the southern end of the growing range, the trees are thriving and hundreds of saplings are taking root.

BBC: NEWS | Science/Nature | Climate threat has plants quivering