At 7:18, Mihdhar and Moqed entered the security checkpoint.
( ( At 7:18 ) ( , ( ( ( Mihdhar and ) Moqed ) ( ( entered ( the ( security checkpoint ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 7:18))) (, ,) (NP (NNP Mihdhar) (CC and) (NNP Moqed)) (VP (VBD entered) (NP (DT the) (NN security) (NN checkpoint))) (. .)))
There was nobody at the security checkpoint at 7:18.
( There ( ( was ( nobody ( at ( ( the ( security checkpoint ) ) ( at 7:18 ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (NP (NN nobody)) (PP (IN at) (NP (NP (DT the) (NN security) (NN checkpoint)) (PP (IN at) (NP (CD 7:18))))))) (. .)))