And challenges for the body.

FORBES: Magazine Article

Several recent studies have come to an identical conclusion, including the High-Level Panel on Threats, Challenges and Change, a body set up by Mr Annan himself.

ECONOMIST: The United Nations

And all these changes, all these challenges, inevitably cause some tension in the body politic.

WHITEHOUSE: President Obama at Michigan Commencement

There are two other pressing challenges that I have raised repeatedly before this body, and that this body has failed to address: entitlement spending and immigration.

NPR: Text of Bush's State of the Union Address

The devices would also circumvent many existing challenges that hamper implantable electronics, namely concerns over longterm effects inside the body, as well as painful or costly implant removal and replacement.

FORBES: DARPA's 'Transient Electronics' Will Disappear Anywhere

However, despite physical challenges, Laurel is seen using her front flippers to hoist her large, heavy body onto the top of the barrier, before wobbling slightly and eventually toppling over the fence to the other side to meet Togo.

BBC: Seal scales fence to reach pup at St Andrews Aquarium