Professor Carol Brayne, from Cambridge University's Institute of Public Health, said Alzheimer's could be tackled simply by becoming more active:
Simply tackling physical inactivity, for example, will reduce levels of obesity, hypertension and diabetes, and prevent some people from developing dementia as well as allowing a healthier old age in general - it's a win-win situation.
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The Conservatives have proposed a counter-extremism commission, while Labour would recruit more security and intelligence staff.
After a global IT crash caused chaos, BA says it aims to run a "near normal schedule" at Gatwick and the "majority of services" at Heathrow.
Georgina Callander's family said the government must "opens its eyes" in the wake of the attack.