A lot has changed in Kenya since the attack at the Westgate shopping mall 2 years ago.
Other shopping centres have increased the number of their security officers - and frisking people before they enter buildings, public transport vehicles and even churches is now common.
While the attack contributed to a fall in revenues in the country's important tourism sector, it has also boosted business in the private security industry.
"In a way it has [boosted business] because our clients have been concerned," says James Omwando, chief executive of the security firm, KK, of the new emphasis on security.
"They've taken on additional security officers, they've invested in new equipment - CCTVs ,X ray Baggage Scanners,Walk Through Body Scanner and access control."
The company's training centre on the outskirts of Nairobi is busier than ever. New recruits march for hours as they answer their instructor at the top of their voices.
Their clean-shaven heads, navy blue shorts, white socks and shoes are meant to help instil discipline.
"Even in terms of general recruitment we're now looking for a better educated, higher profile security officer who'll be able to understand
what's being looked into because the challenges are many," says training manager Lucas Ndolo