Now on his fourth startup, Shader is again putting his resilience to the test.

FORBES: Entrepreneurs

Uncertain times represent a test of resilience, will and character.

FORBES: 5 Things We Learn About Ourselves During Uncertain Times

That will test the resilience of Spanish democracy.

BBC: EU austerity: No quick fix for Spain

But the next few years will test private-equity's resilience.

ECONOMIST: The rise of private equity

It is led by the Department for Environment, Food and Rural Affairs (Defra) and brings together 10 government departments, 34 local resilience forums, emergency responders, water companies, hospitals and schools to test responses to a range of mock flood situations over four days from Monday.

BBC: Thames Valley, Surrey and London flood plan tested