The first topic addressed in the White House video teleconference-at about 9:40-was the physical security of the President, the White House, and federal agencies.
( ( ( ( ( The ( first topic ) ) ( ( addressed ( in ( the ( White ( House ( video teleconference-at ) ) ) ) ) ) ( about 9:40 ) ) ) - ) ( was ( ( the ( physical security ) ) ( of ( ( ( ( ( ( the President ) , ) ( the ( White House ) ) ) , ) and ) ( federal agencies ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (JJ first) (NN topic)) (VP (VBD addressed) (PP (IN in) (NP (DT the) (NNP White) (NNP House) (JJ video) (NN teleconference-at))) (PP (IN about) (NP (CD 9:40))))) (: -) (SQ (VBD was) (NP (NP (DT the) (JJ physical) (NN security)) (PP (IN of) (NP (NP (DT the) (NNP President)) (, ,) (NP (DT the) (NNP White) (NNP House)) (, ,) (CC and) (NP (JJ federal) (NNS agencies)))))) (. .)))
There were no White House video teleconferences held that day or for another week. 
( There ( ( were ( ( no ( White ( House ( video teleconferences ) ) ) ) ( ( ( held ( that day ) ) or ) ( for ( another week ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD were) (NP (NP (DT no) (NNP White) (NNP House) (NN video) (NNS teleconferences)) (UCP (VP (VBN held) (NP (DT that) (NN day))) (CC or) (PP (IN for) (NP (DT another) (NN week)))))) (. .)))