Regarding disruption of the Egypt Mega-Projects Conference. .
Do not assume efficiency on the part of the police. Verify.
Firstly, they do not expect you to target the event.
Secondly, I doubt very much that they will cut off traffic access around a large luxury hotel for 2 days.
Thirdly, the attendees are more likely to trust private security firms instead of local police.
Do not dismiss any chance simply because you assume it will be difficult. Rather, anticipate difficulties and plan your strategy and tactics appropriately.